No, not really. If people would take 30 seconds out of their lives to remember which one is which, us grammar nazi's blood pressure would drop a few points.
There - as in 'over there', or a place/direction.
Their - means ownership as in, it is their's.
They're - abbreviation for 'they are'.
Not hard AT ALL PEOPLE!!
Your - as in, it is your duty to read/learn the difference of there/their/they're and not look like a idiot because you're (abbreviation for 'you are') past the 4th freakin' grade!
Deep breath.....wooosaaaa...woooosaaaaa.