I've been accused of being manipulative more times than I can count, even on here. Most of the time, those accusations are warranted. However, I don't always see how I'm being manipulative. Maybe I'm not in those cases. But perhaps I simply don't know when my behaviour is manipulative, because I have a misunderstanding of what manipulative behaviour is.

So... What is manipulation? How do we determine when manipulation is socially acceptable and when it crosses the moral event horizon into psychopath or politician territory? When is it clever persuasion, and when is it evil? Just curious...