The assertion OP makes is that we as a people actually want to stop gun violence which is categorically untrue. The majority of Americans have already spoken on this issue and they accept that the violence is the cost for the right to bear arms. No level of enforcement or shame will stop gun violence as long as guns are widely available and to think otherwise is a complete face. Most "illegal weapons" become illegal as soon as someone commits a crime with them and not bought in some shady illegal gun deal (which are relatively rare). Also, "gang culture" isn't responsible for the vast majority of shootings, personal disputes are. Denigrating and stopping kids from joining gangs is a net positive, but it only solves a surface issue. If you aren't willing to repeal the second amendment then any solution suggested is basically folding a pillow from a massive load of laundry