I like the snark mark. Although how many people would understand it? You can say stuff like "I don't like the snark mark: ~". ~ And then people start looking for pictures in the punctuation. So I'll never use the snark mark.
Teach English Punctuation System - This is from a college professor who is combatting punctuation "myths" kids pick up in school. It's a nice article. I like the how the "commas go where you breath" myth is debunked.