Ok this is getting fucking ridiculous. First of all, maybe it should be the father that should be punished, not the kid, for not properly storing a fucking firearm. Something that is design to kill people. If your nine year old can get a hand of the weapon, you are not a good parent. Second of all, you can not want your kids to play Minecraft all you want. If you think that the game is having a negative impact of your child, you should probably step in, and make it so that your son can't play it. Minecraft is a violent game, no one can deny it. The violence is tame, but it still is violent, and if you don't want your son to be exposed to violence, you step in. You don't blame the game, you blame you being a piss poor fucking parent.
This reminds me of the Sandy Hook shooting when the media tried to blame Dynasty Warriors for the shooting. FUCKING DYNASTY WARRIORS! School children died, teachers got killed, and you try to blame it on something that doesn't even make sense? Instead of reporting actual news, and telling actual stories about the event, they try to blame it on everything and anything, especially video games.
The main point I'm trying to say is, COMMON SENSE IS KEY!