Also referred as "Wheaton’s Law".
History
editAt Wil Wheaton's final speech on PAX 2007 he referred to that people may think that gamers at anti-social but that conference gathering 30,000 gamers was a proof that gamers are not. And he closed his speech by saying:
So if you happen to cross around someone who thinks we are (anti-social) invite them to play a game with you just try to not be a dick when you own them Ref: https://www.youtube.com/watch?v=TK-H0epcfoQ
The idea grow further and on July 29th, Wheaton's birtday, is now called the "Don't Be a Dick Day"
http://dontbeadickday.com/