Agree... The right proportions of profanity alloyed with correct spelling and grammar can make for a formidably well-forged weapon that will cut through bone like butter.

If someone doesn't know whether to write

Your a cunt, or

You're a cunt

Then they have FAR bigger issues in life to solve than a foul keystroke habit.

As for walking around polluting the air with it, my feelings are mixed. Anything other than the lightest prudent sprinkling puts you fair and square in the dullard camp.