Kicked out for violating a "code"?

I just found out that a girl who attends the same university as me was kicked out of her sorority. Sadly, this young lady has quite a bad reputation for a number of reasons. Anyway, she was at a dance club and was caught peeing in the sink of the ladies restroom. Needless to say, she was kicked out of the club. Since news travels fast at my school, it didn't take long for her sorority to find out about her little escapade and she was kicked out of the sorority. I guess I am just trying to find out if there is any truth to this rumor. Could someone really be kicked out of their sorority for something like this? Was it because she violated some sort of code of behavior?