I live in Philadelphia. The section of Philadelphia that I live in is quite nice and has less than a 1% unoccupied dwelling rate. In sections of the city that are filthy, crime and drug infested have a much higher unoccupied dwelling rate and everyone has tons of roaches. Are roaches attracted to unoccupied dwellings? I have never seen a roach in my life and no one in my neighborhood has either. The streets in the roach infested parts of the city are littered with trash, but I am sure they keep their houses clean - so why would they have roaches? Are they attracked to the filth that lines the streets? Do they simply like the smell of crack? What damage do roaches do to a home? Do they carry disease? Are they attracted to trash or is it coincidence? Since the neighborhood that I am referring to consists of row homes, would it only take one dirty house on the block to have the whole block infested?