And hey, if you like walking around nude, there are nudist parades in the UK too, seriously, go join them!
You are saying they should be ashamed, that's what it means when you push it away from the public and into behind closed doors. But PRIDE was, is and always will be the place to express yourself and be met with love and acceptance. Within bounds of the law of course, no one will have a full on sex on the parade.
Your "safeguarding" is more like attempt at censorship, as I guess there is nothing worse than a kid learning that using whips or chains can be fun, and that enjoying it is not something that they will be shunned for, but instead that there is whole group of people enjoying what they are enjoying.
You know, you do you, but actually do you, not just "the you that I accept and like".
I have couple of kids fyi, since you are trying to climb that high horse, loving kids that no one taught hate, instead they learn to accept and cherish people who are a bit queer and different, not clutch their pearls online.