There is locational, their is possesive, they're is they are. The three words aren't hard to get used to at all. In other words...
i really have a hard time taking anyone seriously who demonstrates an inability to distinguish between THEIR, THERE, THEY'RE and other such mixups. (meaning more than an occasional slipup). to me, it just screams "moron".
I hear you, this is the main reason i don't take the alaska independence party website seriously (rofl).
Then again one thing that really got me growing up was the "

" problem herra mentioned (of course it's actually "a lot"). In 5th grade teachers were just having a hard time with "a lot" and the students. I always understood "a lot" to be one word which was "

"; so did many other of the students in the school.
The big problem was caused by a lot of elementary school dictionaries used all over the school for all elementary grades. These dictionaries had "

" listed as a word with a definition for the exact same usage and meaning of the two words "a lot".
Least to say, everyone had it very well ingrained in there head that it's actually "a lot". Then i think the school purchased new and better elementary school dictionaries.