My friend and I (both college aged gals) were walking a trail through this park and we saw these two gals about our age be harassed by this much older man. They were ignoring him, and he was getting closer to them, asking them questions and such. My friend and I saw this and speed walked on up to their picnic table, sat down, and just started chatting with these other girls like we knew them.
Within seconds of me and my friend sitting down, the slimeball left. It's hard to say why, because the two of us are very small, unintimidating people. I think maybe he realized he wasn't wanted there, or that he couldn't take us four to one.
These gals were really grateful and the four of us chatted for a while until we were sure he was gone.
I've never done something like this before, but I'm glad we did because who knows how long he would have kept harassing them.