We didn't pin at my school, so maybe that's why I'm not a big fan. I have my own lovely lamp to wear; I don't want a boyfriend's pin. I'd feel weird about wearing a fraternity pin anyway, since obviously I wouldn't be a member.
What we did at my school was, guys would lavalier girls. I think lavaliering is great, but if I were ever lavaliered, I would proudly wear the lavalier but probably not letter shirts or anything. Here, a girl is entitled to wear the letters of the fraternity as well, but, well...I've got my own letters.
I like the
idea behind pinning, though. The pledge pin thing is an interesting idea.