This is an interesting point. So the housing problem is (at least partially) a crime problem? Because I don't think there's anything that makes low income housing _inherently_ unpleasant to live next to; it's more a question of how the people who live there tend to conduct themselves, and to what extent that behavior is tolerated by the local authorities. I don't often see people complaining about living next to affordable senior living centers, so it's not really the income level of the residents that's the problem.