Laying low is a good idea NF. I'm sorry that kind of stuff is happening in your building. It's very unnerving I'm sure.
But, let me tell you, this kind of thing happens everywhere, not just Section 8 housing. Here is an article from our local newspaper about a couple in Franklin who were living right near downtown (small town NH) and not in Section 8 housing either -
http://www.concordmonitor.com/apps/p...NTPAGE/4080363
It's so unfortunate that no matter where you live these days, this kind of thing happens.....more than unfortunate, it's damned scary!