I kind of agree with Tatersol, but I can understand the modrbid curiosity factor. If I were to send your letter in, I would make it pretty plain that I was less curious about the alleged "bigttx" situation than a practice of chat-room viewing by the UT admissions office. I think this is the thrust of your request, right?
In the end, albeit overthetop, I think it is a fair question to ask and not misleading to say that it will impact your decision to attend or not. Can't wait to hear back about how they respond!
(If it's true, they are probably already crafting a reponse internally...