Pashal you're being ridiculous.
Pretending Me Too is the belief that all men are rapists is just disgusting and you should be ashamed of yourself. If you need to lie about a movement to be able to dismiss it, then you cannot dismiss it. If you really prefer a society where men could leer at and exploit girls and women, and they were seen as problematic if they tried to stand up against it, then you have issues.
Of course the vast majority of people don't abuse. But it's common enough that a lot of people are abused. Some women are perpetrators, but statistically it's overwhelmingly more likely to be a man. Not liking facts doesn't alter them, or I would look like a supermodel and own a winning Euromillions ticket. Suggesting that wanting to avoid a pointless risk, is the same as accusing the person in that situation of definitely being a predator, is like saying people wanting to strap their kids into car seats are crazy and assuming the car will crash and should just merrily load them up without because OMG what are the odds? In both situations it's worth a simple precaution to avoid a horribly damaging and awful risk.The main difference is that abuse is a lot more common than a car crash.
In this case, there are two girls and a boy in that room, so the odds of any abuse are really, really low. That's not the issue (though it would be a reasonable concern if it were - DBS's weren't invented because schools just love paperwork). The concern is that two grownups want to fuck to the point they don't care about the comfort, dignity and happiness of their children.
If you really think that poor 16 year old boy wants to have to share a room with two kids, you're nuts. And any girl developing boundaries and her right to say when a situation makes her uncomfortable should be supported in doing so. It's an incredibly important life skill for anyone, but especially a young girl. Yet the parents are just manipulating, browbeating and shaming her. That's shit.
I don't know why you have such a bee in your bonnet on this one, but pretending abuse never happens (and if alleged the girl must be lying, and anyone saying otherwise thinks all men are rapists - which is what your Mee Too rants seem to suggest) isn't really the sanest stance to adopt.