I know that there have been times where a pitcher has thrown a ball over the plate enough for a hitter to get a hit, and even hit a home run in some cases. My question is more along the lines of:
If he throws one over the plate and in the strike zone, and the hitter does not swing, is it a strike?
Is there anything in the rule book saying that a catcher cannot deke the hitter by standing up and signaling for an intentional walk and then having the pitcher throw a strike?
This would be frowned upon as far as "unwritten rules" go, and someone would probably get hit by a pitch as a result. I haven't seen it happen, but it could be a strategy against a good hitter in a big game (ie- playoffs, world series, etc).