This is a petition to ban children from playing rated M games, in particular Left 4 Dead and its sequel Left 4 Dead 2. A rated M game is no different from letting kids into a rated R movie and quite honestly, it ruins the game for those who are old enough. A certain maturity factor is lacking when children are allowed to play these adult games and there are many occasions where they will join a game and start "team killing" or running off and getting their character killed, then "rage quitting". This ruins scores and the experience of having a good game. PLEASE sign this petition if you have ever fallen victim to a kid joining your game who either started shooting you, runs off, keeps joining your game in order to sabotage you in any way. Thank you.