Unsafe catcher

[rbmartin]

I was just watching a team practice last night and noticed a catcher doing something I consider unsafe. While a runner was coming in from 3rd on a hit (no play at the plate) F2 was standing in the baseline extended beyond home plate (basically in the batters box for a left handed batter) gazing out to the field watching the ball. The scoring runner had to either slide, stop on a dime or bump into F2. He was NOT actually blocking the runners access to the plate or doing anything malicious, just silly and unsafe.

I got to wondering if this was a game and I was behind the plate, what would my best course of action be?
If in a game situation, R3 would have bumped into F2 with a great amount of force, what if anything would I call (Babe Ruth/OBR rules)?