Copied and pasted from AIBU, as users of this forum might have more knowledge of the legal aspect of this. Or might not, as it might be the same posters!?
There was a staff meal last night, and some of us went on to a club after woods. Not really my scene tbh, but I went along anyway.
At one point, after we had all had quite a few drinks, I was standing alone by the wall, and several colleagues standing near by with their back to me, and I listened in on their conversation.
They were laughing and joking about their treatment of several women at work, treatment which I can only describe as bullying and sexual harassment. ( including one man exposing himself to quite an elderly, straight laced female manager)
They were imitating the shocked reactions they could get and laughing about embarrassing and shocking people, and planning who to target next.
I don't know if the people they mention were upset, or traumatised or laughed it off. They mentioned three people, of which I know two quite well, neither have ever said anything to me or in my hearing about this. They might consider it nothing, or they might not want other people to know about it.
But of course, if they want to report it, i now have cooberating evidence, having heard this conversation.