Actually thisisme the 2nd amendment was written exactly for that reason, they wanted to grant protections from criminals and corrupt governments, try reading the federalist papers.
The thing reviewers never take in to account when they poo-poo the damage these games can cause, is the average person isn't nearly as intelligent as they are. Most of humanity is little more than talking apes who imitate the things they see. So the "new" wave of gang violence isn't the result...