[Aliantha]

What goes around comes around. She'll get hers one day just like everyone else.

It's not going to make any difference to her if you do or don't participate, so I'd suggest not worrying about how someone with an irrational dislike treats you. I know I wouldn't.

Also, younger people are still finding their way in the world. I encountered very similar situations when I was a 30 something university student. I think most mature age students do. The younger kids feel threatened or that they know better than you how the world should work. Remember, you're encroaching on their territory. The domain of the young and beautiful. How dare you.