I'm too cheap to spend money on passive-aggressiveness but kudos to this dude

An artist in New York has created a Social Etiquette ad campaign and funded it completely on his own.
Jay Shells told Animal New York, an online magazine, he surveyed 100 people on their top pet peeves while riding the subway and picked 10 to create posters for.

You can read the rest of the story here.

Thanks to AS for the link.