The "I don't care" attitude, combined with the chatroom grammar and spelling, is really going to pay off when in the job market.
I know too many "high school graduates" whom I would be willing to bet significant sums of money that they could not pass the english portion of the latest graduation aptitude test, based upon their spoken and/or posting grammar.
Look at any managerial job description. The first requirement listed is "excellent communication skills". "Practice makes perfect"?
To you, who does not care how you type/spell/use grammar at all times, I have one thing to say.....
Can I BIGGIE SIZE that order please?