No, it's not going to be a rule -- each PNM can do as she wants, although she might not make any friends if she's super-negative and decides to use names. ("OH, I HATED those Tri Delts! They were so b*tchy and boring . . ."
)
I think the point of this thread is to help the PNMs make their decisions. Rush is such a stressful time and we don't want them stressing out about things like this any more than they have to.