freddy77,
I’m sorry, but your “rock solid fact” hasn’t been apparent to me, and when I’ve asked similar questions on official’s boards I’ve been almost universally criticized as not understanding how umpires call games. It may happen, but I don’t believe it happens all the time or even most of the time. What you saying in effect is, umpires make a conscious decision how they’re going to call pitches based on a batters appearance and that’s just not something I’ve personally seen.
Umpires are human.
If they don't respect a batter, the marginal calls go against him.
Same thing if they don't respect a pitcher, though somewhat less because strikes and outs get the umpire home for dinner sooner.
"When in doubt, call him out."
Come on, Stats, this is basic stuff.