Without a zero-tolerance policy on liars, I would rapidly be manipulated into losing what little control of my own life remains.

I suspect this is inaccurate and you would be better off with rules like "I won't do large favors for friends who haven't reciprocated medium favors in the past" or "I won't be friends/romantic partners with people who tell me what to do in areas that are none of their business." Virtually none of the manipulation I've been harmed by in the past has involved actual lies. Though maybe your extended social circle (friends of friends of friends, people at university, etc.) has different preferred methods of manipulation than mine does.