Well, we seem to be in another mini-epidemic of bad-lousy traders. Unfortunate, but it happens. There's little defense against a long-time, well-established trader going off the rails, but what about the rest of humanity? So my question is: what are your personal red flags? My biggee: Slow Responder Guy. If I'm trying to set up a trade, & there's a two or three day lag time between responses, I'm going to call it off. Maybe I'm paranoid, but I always figure that if someone doesn't have time for a thirty or ninety second response to an inquiry or refinement of a trade for days at a time, the chances of them finding time to pack up a box in their supremely busy schedule are close to nil. The once or twice I've broken my own rule, I've rued it (though the slow-motion traders still came through in the end). Let's hear it. It would be nice to know what other people consider their 'red lines'.