Over all in dance scenes irrespective of age there is only tiny minority that can be called creeps. They are not enough in number to cause scene to suffer.
So, I do not take the "do migrants misbehave" bait this time, but go to this one ...
Imagine yourself a situation:
You are in your early 20s, and your mother is having her friends over.
There is nice food and cake, some more or less boring topics - what "older" cliche women do.
Oh, and a little liquor.
One after another they will secretly starting to flirt with you. A nice comment here, a flattering there. Some may maybe offer their daughters to you.
When you are in the hallway, where the others cannot see her, she will touch your leg, whispers in your ear, that you should come close or offers you a deeper look in her cleavage. .
Such stuff.
Specially when your mother is not around, the approaches will be more openly and when they think you can't hear them, you can hear them talking about your nice ass or what they would like to do to you - or your friends from university.
They will share magazines, with topics like "why young men need an older woman" or "show those teen girls, that you can get their boy laid".
They are usually 10 friends around, of a larger group of around 20.
In these 20 are 1-2 which actually get physically touching, the 2-3 more flirt very actively and 5-6 more who at least sometimes join in, but don't start by their own. That makes like half the total.
How long will it take, until you find something else to do, when your mother got her weekly dinner with friends?
If those were women, you actually would be interested in - potentially - you might use the chance and get some of them laid. I once heard the phrase "It's only harassment, when the guy looks bad".
When you are with your boys, you might sit in your room and ******** about those old chicks, while doing your group's stuff.
But when you are alone, you might get an interest for a lockable door quickly ...
And then there of course are those, who go outside their "old girls party" and actively hunt.
Some may throw parties for younger people, and play the experienced old chick.
Others get touchy any time, they feel unobserved.
Others show their cleavage at anyone who isn't away quickly enough.
Others always have a dozen spare keys to their hotel room at hand.
Others go to the club where you go with your friends, and try to get you laid with booze - and even threaten you to tell the stories she knows about you to everyone, when you tell your mother.
Others may use so much paint, that you might think they are 30, when it is dark in the club.
And so on ...
Well, and some will actually try to get into your room, when you don't lock it.
And they will not be ashamed to tell anyone, you are lying or you were the one actually asking for it and benefiting from it, when you complain anywhere ... and of course they will pull their friendship strings to make sure, other's accept (or even believe) that explanation.
What for most guys sound an absurd situation, is reality for many women.
It is enough, if a few behave badly, if the others don't stop them, the whole group will be seen as problematic.
And when the problematic group actually makes up the majority in a room, people who are fed up with this situation, stay away.
There are many ways, social structures and social inequalities can lead to abuse and discrimination. This is only one of them, but it is very common.
And while in more traditional countries, younger people are more acceptable to misbehavior of the older generations - "respect the elderly" - in modern countries, they don't look for the flaw in themselves and are more prone to openly say how it is: This is simply sexual harassment. And any group, which accept that their group members behave that way towards people of the outside group, is part of the problem.
No matter of skin colour, language spoken, religion followed, age or sex.
So, how high is the impact really?
A single randomly molesting guy is an minor problem. The situation gets problematic, when it reaches the point, that people are under constant pressure and feel they lack the ability to defend themselves.
First the vulnerable are leaving, which increases the hunting pressure on the less vulnerable, which then leave too.
At the end only those, protected by their friends group - they male friends! - stay. And don't see a problem, as they are not molested in that way.
In well running Bachata parties about 5-10% of the guys in the room are "girl hunters" - which again, simply means an older guy, who seeks out younger women for more or less sensual dancing.
Our local Zouk scene is held down by a single guy!
He is an elderly, extremely well connected guy, who organizes free Latin dance parties, where he uses his position to "teach" sensual dancing - mostly Zouk and Kizomba - to young beginners. Including sentences like "don't be shy, those dances are dances closer". (Only when his wife isn't there of course.) His Facebook friends list is longer than all local Latin dance groups together and other organizers fear his anger, as nobody openly speaks up against him - and when done so he uses his power to bully them.
As the Zouk scene is very small, every single younger woman will be approached by him, often on her first party. And well, without people telling her otherwise - aside from those outsiders, who don't host a 2000 person friendslist on FB - she accepts the offer of free parties. And not knowing better and him obviously being a better dancer, than the guys from the class, she falls into the trap ...
There she quickly has the choice:
a) Either she bows to him and his autocratic dance style, and becomes a dull puppet, praising him and searching the fault in her own, if something goes bad
b) becomes the evil girl, who discriminates against older people
c) gets a boyfriend who protects her or
d) leaves.
The advanced women all either stay away from his parties or pretend to know nothing of it, while only showing up with male company ... and when I spoke with people about it, I heard from dozens of young women who stopped dancing Zouk because of bad experiences with him and the bad taste, this very sensual dance became because of him. Those are the ones, who still stayed in Salsa though or went back to Bachata, where the molesters at least are their age.
Yes, that is the situation, when a single person in a position of power and without anyone in the hierarchy really speaking up, abuses this power.
Read point b) again please.
I want to quote my girlfriend:
"I don't want to be seen as the girl, who does not dance with someone, just because he is old."