I would NEVER misuse those words. The they're/their/there conundrum is the bane of my existence. I've always prided myself on knowing the difference. The fact that I made that mistake should prove that I've hopped the train to Crazy Town, never to return again.
What have I become?!?!
P.S. Despite the fact that I said I wasn't going to edit that post, I did. I can't handle someone, someday, reading my brilliance and then scoffing at my grammar