Well seeing letter's somewhere that you didn't expect....well, the worst one for us was on a different sorority (Sigma Alpha) during greek sing. One of their girls was a Sigma Kappa for a day (long enough to get a bid day shirt) about 2 years ago, and when they got to thier part about Sigma Kappa in their song she just happend to pop out in her old Sigma Kappa bid day shirt!
Needless to say we were pissed and are going to start keeping better track of getting back letters of those who drop!