I know this is very much a minority opinion, and I suspect your question was rhetorical, but my answer would be "yes". Actually, my answer would be "I don't use social networks," but that's rather beside the point.

You know what they say about two people and keeping secrets. It just happens to be a lot tougher to correct your mistake when one of the "people" (the database, in this case) is fully mirrored in three or four different places. Much easier to just be cautious and not make the mistake in the first place.