When there is moderately aggressive wresting, in the neutral position, near the edge of the mat, I think the wrestler who ends up out-of-bounds rather than circling or pushing back toward the center (by stepping up the aggression) is fleeing the mat. Too often this is called OOB and nothing else.
First of all he's supposed to be making an honest attempt to stay within the 10-ft circle to avoid a stalling call. If he allows himself to go out of the 28-ft circle he is guilty of a greater offense than stalling, right? Granted, after a warning has been issued the stalling penalty is the same as the TV for fleeing.
Sometimes, in this situation, the guy with his back to the center gets hit for forcing his opponent out of the wrestling area. This should not happen. He's the aggressor. He's going toward his opponent. As long as he's not obviously shoving the guy out, he should be given the benefit of the doubt ...that he's setting something up. The other guy needs to offer some resistance instead of backing up.
Looking at the feet and determining whether more weight is on the heels or balls of the feet can really be a "tell".