You know not to sound like the old b*tch of the bunch here, but aren't we all being a little judgemental? It sounds like what that girl really needs is a friend to help her out not someone to tear her down and treat her like crap. Her self esteem is probably low enough considering what she did at the party.
I feel bad for the girl. Some may say she should know better, but maybe she needs a push in the right direction instead of a punch in the gut.
And taking joy in making someone feel bad? I don't know... just sounds kind of mean spirited.