No one in his or her right mind wants prostitutes soliciting on the playground or crack dealers at church suppers. We have a right not only to law, but also to order. Next, allow ordinary citizens to own and conceal deadly weapons. The punk who makes his living intimidating law abiding citizens will think more than twice before accosting someone who may be armed. Finally, encourage vigilantism.
Neighborhood watches are fine in principal, but in practice they have major flaws.
First of all, they are organized around the current law enforcement agencies. This means that all complaints funnel into those agencies, already overburdened with work. In most major metropolitan areas, the 911 facility is so jammed up that you often get put on hold in an emergency or can't get through at all. It also means that neighbors that don't like one another can use these agencies to mess with each other by filing false or misleading claims. By vigilantism, I mean take the police out of it altogether.