Well, I'd be more inclined to believe it if we had some sort of reference to it. I couldn't even find anything using casual searches. So I'd say it very well is something that's made up and/or propagated by people that seek to discredit gated communities. You can't just pass off second-hand "rumours" as facts. Even if it's something that's "commonly known", we'd be doing a disservice to those that live in gated communities that aren't racist at all.