Regular readers (if any) will know that I abhor bad spelling. Yes, everyone makes typos, so that's fine. Or if you're in a rush and misspell something, knowing it's wrong, but don't have the time to check how it's actually written - I'll let that slide, too.
What I hate is people who consistently spell a word improperly. My friend the DoctaCSG mentioned recently that he hates it when people write "congradulations". I agreed with him and then I open up Facebook and sure enough, someone else wrote "congrads". Congrads? Are you for real? Have you ever read a book? Does it even sound like there's a D in there?
That's just one of the words I hate seeing misspelled (misspelled itself often being misspelled with only 1 s). Another thing that often tricks people is "should've". I very often see people write "should of". Only morons write this. If you write "should of", then tah-dah! I got news for you. You're a moron. Think about what you write. Does "should of" make any sense? It's supposed to be a contraction of "should have". "Should of" is meaningless and merely serves to flaunt your illiteracy to the world at large. But if you write "should of", then chances are your friends are illiterate too so there's not much chance that they'll read your grievous error.
Lastly, why are people tricked up by "ridiculous"? I've often seen it written "rediculous". It's not even pronounced that way. Does anyone outside of a Southern stereotype pronounce it "ree-diculous"? No. It's rid-iculous. Say it right. Do you say "ridicule" or "ree-dicule"? Exactly.
In short, stop being a dolt. Read a book now and then that isn't written by Stephenie Meyer and learn a god damned thing or two about proper use of language.