I've had neighbours from hell, both here and in the USA. We bought a house many years ago here in the UK, lived in it for almost 20 years. The day we were moving in the guy from next door introduced himself and said, "You will have to raise my chimney as the smoke blows onto his house", unbelievable! Over the next few years this guy became a major pain in the but. Fortunately he died, so sticking needles into a doll worked for me. Now it was as a result of this experience I learned to check out my neighbours a little more carefully. The tell-tale signs that something is potentially wrong are:
1/ No eye contact when talking to you... you'll find these people tend to treat every question like an inquisition and probably do have a lot to hide.
2/ Too much eye contact when talking to you... the person is psychotic.
3/ Too much enthusiasm...these people give too much too quickly and expect a lot in return too quickly.
4/ Gives vague responses about the neighbours...either is the neighbour from hell or knows who it is, the fact remains, there is a neighbour from hell in the area.
5/ Wants to be too helpful...Usually the person is really being extremely nosey, these people are usually harmless but can be a pain the ass if you let them into your life.
6/ Doesn't want to be helpful at all...this person is the neighbour from hell.
The physical signs that you should not live in the area are...
If you hear gun shots when you are talking to the neighbours...this is really a very bad sign...I had this problem when I returned to the States for an extended period and rented an apartment in Florida.
If you can't walk on the pavement because it's like a dog turd obstacle course....something like the area I currently live in, of course I've got great neighbours so I don't mind this too much
The neighbours keep more than ten cats...usually the house you're looking at will be the local cat loo (toilet in American), particularly if no one has lived in the house your thinking of buying for a while...I'd know this because the house I bought and am currently renovating had, and occasional still has, this problem.
If the house next to the one you're interested in looks like a builders yard and has weeds growing up through the rubbish piled outside...the house probably belongs to a builder/DIY'er from hell...I would know this because I'm one of them
Finally, if you find you have mistakenly moved into the wrong area get a degree in psychology....it won't help but it will keep you occupied for a while.