I don't believe it is an obvious attempt to thwart anything....I notice on facebook (and here for that matter) that many people just can't spell worth shit. Same goes for punctuation and grammar.
Just go to minnieapple's thread a while back where she was looking for career advice. The spelling etc was atrocious there. IMO there is no reason for this considering how spell check is everywhere.
Here's a recent one from facebook that immediately comes to mind: a woman was talking about how guys stare at her boobs when they talk to her and she said (no word of a lie) that she "didn't like being looked at like a piece of stake" So, me being the smartass, I said "well, I find it had to believe that anyone would stare at a wooden post sharpened at one end....lol