People - don't take the law into your own hands. That's vigilantism, and it has no place in an ordered society. When you have a complaint about a neighbor, you first call the police if you can't approach the neighbor. Hoepfully, it solves the problem then and there, but if not, at least it creates a record so you can begin to get the law on your side. You don't make threats, or terrorize children, or kill pets. The kinds of folks who would do such things don't belong in a neighborhood with other people, and they surely don't deserve the protections of government at any level. That's who I would consider "unstable", not the person who properly points out the law.