It's WAY North of 4,000 if you count all of Mexico, and its a mix of drug gangs and the traffickers. The problem is there HAVE been innocents shot, killed, and disappeared, these animals don't go to sniper school and learn the one shot one kill method, rather, they spray bullets all over hoping to hit their target. Just this last year, they sprayed a bus that was behind the person they were aiming for, and in another instance they killed their target and his young son that was sitting in next to him (shooting THRU the boy to get him!), so these animals have ZERO respect for life, and will mow down 10 innocents to get the 1 guy they want. They also kidnap and kill the families, friends, and associates of their targets as well, so, you are very wrong in your statement. I understand where your coming from, "just let them all kill each other" is a common sentiment.... its just not realistic. Not to mention the adverse negative effect it has on the country in places like tourism, investments, and the general security. I wish there was a magic wand, but sadly this is something that I fear will never end, as no matter what the laws, there will always be people who just don't respect life or care about others.