Yes, it's your choice to forget it and move on.  That's mostly what women do because there's usually no witness.  And if you can't do anything about it, then don't dwell on it.  People have to let go of trauma and move on.  They don't totally forget.

When I say trust your gut, I mean that if a woman feels uncomfortable with someone's behavoir, they should leave.  But tell at least one person to document what happened in case it gets worse and you do end up at the police station.  It can be useful as corroborating evidence.

But even if you don't go public, women (and men too) do pass along warnings about creeps through gossip.  It has an important function and is ethical.  Gossip got a bad rap because society characterizes women as vengeful and unfair.  It's not like that.

After I wrote the post, I found an article that expressed the same ideas better than I.  For your interest:
https://www.buzzfeed.com/annehelenpetersen/women-believe-other-women?utm_term=.ndlwzGPw3#.tuVOEPeO3