
Any responsible parent explores the games content on their own. Ratings are unreliable for any game where addons, mods, or online interaction are concerned.
I still find it disturbing that little Billy's parents would go batshit crazy if he saw a female nipple, but couldn't care less if he was playing a game where the goal was to murder police officers.
That is assuming the network and computer are setup properly.
If the computer the child uses becomes infected, the malware may try to infect other computers on the network.
By using network sharing features, UPnP, or even a dictionary attack on other networked computers user passwords, the malware could compromise other computers on the network.
I also believe maturity and knowledge of threats on the internet are more important than age, but we don't want any laws broken.
"Most of us, when all is said and done, like what we like and make up reasons for it afterwards." -- Soren F. Petersen