Rick, I'm so sorry. I can understand how frustrating and embarassing this all must feel to you and your brothers.
I didn't really personally know any Theta Chi's when I was active a few years ago but from what I heard my friends saying about them, they seemed well liked and respected. I guess things have changed recently and thats really sad.
However I hope nobody assumes that ALL the members of these fraternities were involved in drugs or knew about it because they probably weren't. It sucks because I bet a lot of people are going to lump all of the members/alumni together. You should never have to feel embarrassed to say you're in a GLO