You could say the same about anyone who deviates from the norms of whatever society he's in. One could say that Richard Stallman, for example, "behaves in a man

You could say the same about anyone who deviates from the norms of whatever society he's in. One could say that Richard Stallman, for example, "behaves in a manner inconsistent with the mean collective human perception of reality". But is he a danger to himself and others just because he does so?