My answer to question...
1. The government shouldn't allowed to intervene in people's private/public purchases, those said purchases are up to the said peoples.
2. A violation of children's rights? Eh, I'm a kid myself and I really don't have an opinion about that. But if the parents allow their kid(s) to play violent games like the GTA series, then the parents are responsible for the outcome of the kid(s) playing the game. It's not the game's fault, it's the parent's fault.