Well I think that most internet acronyms in general are redundant. I use them for the ease of typing, but most people new to the Net don't understand them and pester people about them. Besides, it once again doesn't encourage good grammar, which is rare on forums other than this one.

So yes, I'm guilty of using those. I'm not one to really enjoy using pointless acronyms in more serious writing though. I've heard of people who are addicted to it, and I really don't understand why.