How do you feel when people who are not in your Frat/Sor. wear your letters?

[AlphaSigOU]

And I don't blame you guys one bit for protecting your letters! If you don't know what they stand for, don't be caught wearing 'em. It leads to - at the very least - awkward moments, especially if you decide to prove if they are really members by the usual manners and methods (secret grips, phrases, etc.) and they don't know how to respond properly.

The same goes with wearing the Masonic Square and Compasses - in certain states, it is a crime to wear them if you are not a Master Mason in good standing.