Excellent points. I think that's one reason why management must consider this behavior unacceptable and make that abundantly clear to everyone ahead of time. Silentl disapproval isn't enough, because the victims won't trust you to come forward, and the attackers won't be detered. It's also the reason sexist jokes and seemingly harmless behavior is problematic; it sends the the message to attackers and victims alike that nobody takes these issues seriously.