Batter prevents ball from rolling fair

[Dakota]

Originally Posted by greymule

If there isn't a rule against a batter, coach, runner, intentionally interfering with a batted ball that has a chance to become fair, there should be.

Leave out the blindingly obvious scenarios, and go back to the ordinary runner advancing, taking a lead off 3rd, running to 1B, etc. Forget about the instinctive reaction by some of you that "somebody's gotta pay..."

Is adding the "intentionally interfering with a ground ball in foul territory that, ITUJ, has a chance to go fair" a good thing or a bad thing from the umpire's perspective?

Doesn't any batted ball have "a chance" to go fair until it stops or makes contact with something foreign to the ground? Aren't we taught to wait until it actually IS foul before calling it FOUL? Why are we taught that?

What if it is to the offense's disadvantage for the ball to stay foul? What then?