Well, since this is at the top I can post without bumping this...thing.
Xbox live gold account.
You have to pay a subscription fee for this.
If you didn't get that the first time round: xbox live requires a subscription.
Now, does a subscription really reduce a number of 'children' on a service?
Oh, plus what you're thinking of is immaturity - there are people below the age of 18 on here who don't smear their faeces on their computer screen. There are many people above the age of 18 who act like that is the done thing. If you could just you need a GTA Forums premium account to see this content (pardon my french) and realise that a) kids can get subscriptions without their parents batting an eye and b) age isn't maturity, that would be great.