When you apologize where one was not necessary you feed into the dumb theory that the middle of the field is some sort of sacred ground.
If you hit the P, by all means apologize.
If you were close enough with a hard enough shot that it was truly a little scary, apologize......if you want to.
If you hit a nice shot and he happens to make a nice play, just say "nice play" and give credit where it's due instead of apologizing and making it like you're some sort of superstar and he's lucky he's not dead simply from pitching to your greatness.
If you hit a weakass shot and he fields it, walk your ass to the dugout after he throws you out. If he misses it, run to first and be thankful he stinks.
If you're more than an arms reach from the P, act like you've gotten a base hit before and run to first like you would if you hit the 5-6 hole.
If you hit a female pitcher, kill yourself!
Did I miss anything?