Used to be a pedant myself but i grew up, got over myself and realized there are far more important things to worry about.
Its incredibly easy to use a spell checker and most browsers will have them built in, so i don't need to waste my valuable finger skin to pretend im superior to the next guy.
Sure you can learn a lot about the person by their attitude to how they write, like you can from the way they dress or music they like...
Only think i find truly amusing is people typing loose when they mean lose. That blows my mind.
im so tired... i hope i left some spelling mistakes behind.