A surprising amount of conflict, and just plain crazy, from these 'virtual enviroments' does spill over into the 'real world' -both are real since you are interacting with them, just through a different medium, which I think alot of people tend to forget. They assume different social attitudes within the game/simulation enviroment that'll allow them to act out in ways they would never consider in actual person to person interactions mainly due to the aninimity granted through the creation of 'virtual personas'... only thing is though some people take it to extremes, or become so invested emotionally in the virtual world they make extremely poor choices when it comes to the real world.
A case in point is this:
http://www.qj.net/WoW-player-harrass...g/49/aid/91058
Guy was an a**hole in game to a woman - woman's husband gets mad and tells guy off in game - a**hole makes mistake of telling husband off and stupidly giving out his physical address - a**hole ends up getting badly beaten up by irrate husband and buddies...