Hmm if I am to take this thread seriously:
yeah I do take spelling seriously - after all the jokes I've made about people's spelling, I try not to make the mistakes I've taken the piss out of
so if I do, I'll go back and correct it
Some spelling/grammar mistakes do annoy me a lot though, like when people get mixed up with "their", "they're" and "there". Another one that pisses me off is when people mix up "your" and "you're". It just makes them look dumb and I prefer to look at people in a positive light if I can.