Lisa: "Come to Homer's BBBQ, the extra 'B' is for BYOBB" Bart: What's that extra B for? Homer Simpson: That's a typo.
I don't blame you for this. I've had more than one person make it a point in asking why I'm the only person in the world who regularly uses semi-colons in text message conversations. The best I can tell them is it's chic, unique, and the best of the available colons.
The only one I use on message boards is "Pics or GTFO!". If I'm texting/emailing a chick, I find myself sometimes using "Lol". In general, I'll also occasionally use shorthand for certain words when texting, e.g., "u" for "you". Personally, I've never found it to take up a significantly more amount of time when typing on a message board to use proper grammar, spelling, and capitalization. Call me old school in that I believe the way in which you communicate your message also speaks about yourself.
They drive me crazy! I hate them! Aside from LOL or the occasional ROFL you won't ever catch me using them. What I really hate is when a new one comes along like QFT or OP, I have to waste time looking the damn things up. They make me insane!