Another intersting "it doesn't work that way" thing I have noticed: when the drug dealers moved in about a block away, shady activities and late night noise decreased.  Seems that they don't want attention drawn to themselves, so they are good neighbors.  Their clients all seem to know better than to linger in the area too.<p>This of course goes against conventional wisdom of "there goes the neighborhood".<p>Edit: That should be: "other shady actvities..."