People who can't determine what form of they're/their/there are IDIOTS.
IDIOTS I SAY!!
These are the same people who use your/you're incorrectly. I've actually refuse to talk to some people online because their spelling is so poor. Note that these are college students who only speak English. Well, at least they try to.
Looks like I'll be getting another promotion, partly because I can make sentences using correct words. Too bad for the ignorant.