Hi, I felt compelled to join Mumsnet to add my thoughts to this discussion.
I?ve played Black Ops through on single player (offline) and currently playing multi-player (online). I?ve been playing games for over 2 decades, I love ?em!
The single player missions are gory, you?re being tortured (electro-shock, chemical, mental) for info thought the story which is told through flashbacks. During the game, cut scenes (short story building un-skipable in-game set pieces) a character has an eye gouged out with a knife, you force a shard of glass into a contacts mouth then punch him in the face, knife people in the throat and you also watch others forced into a gas chamber and get gassed. In game play you use human shields, watch people burn and see burnt, mutilated and mutated (by gas) corpses. These are just some of the scenes I remember off the top of my head, the game does have a BBFC 18 rating, they don?t make it illegal to sell to under 18?s for nothing. Online gameplay is different as there?s no story, just other gamers to play with, so the experience depends greatly on who DS/DD is playing against/with or talking to at the other end. Homophobic pre-teens, neo-nazis, sweary Americans, all the consoles (and in-game in Black Ops) have ?griefing? systems inplace to report troublesome players.
As one commenter mentioned the player can choose to turn the violence off or on. And consoles do have some parental control settings.
There are 2 classification systems PEGI and BBFC, the latter the only one with legal clout. Both the websites (pegi.eu and an iPhone App ?PEGI? and pbbfc.co.uk) have lot of advice for parents on games, parental controls on consoles, online safety, links to studies and specific information on the games and why they got the rating they did.
Whether you buy CoD:BO for DS/D who?s under age or not is you?re choice. Just make sure you?re not complacent in that choice.