It's rather humorous to see how seriously we take etiquette. That being said, damn anyone who thinks themselves above "the rules."

I remember a stoner from my college, this kid would treat any piece passed to him like a microphone. Just sit there and hold it, talking away. 1 min. 2 min. This could go on at length unless somone intervened. Long story short, his personal record was intercepting all 3 bowls during a hotbox session in the roomates car. He just calmly sat there yakking away, juggling 3 bowls, 3 lighters, and a worthless brain.

If you have a friend displays these incorrect tendencies, I find it useful to use their name to describe what they are doing wrong. i.e lets say "Winston" is treating the bowl like a microphone. calmy ask him to stop "winning the bowl." Bonus points if you keep it up among your friends.