You may have seen in the news that Google is researching methods to censor the web.
Google's censorship is nothing new: they've been censoring this site for nearly 7 years.
And lying about it. You can read
more about Google's censorship here.
Used in online discussions and chat by Massive Multiplayer Online Role-Playing Games (MMORPG) players to indicate their will of being invited in a group to do dungeons, cooperative tasks, kill a big boss, etc...