So guys, here is a play that happened to me last fall during a Pony Bronco (11-12yr olds) game.
Bottom of the final inning, 2 outs, 2-2 count, tie game, winning run on third. F1 throws one up and inside (head height). B1 crouches down to avoid being HBP. However, in the process of doing so, he doesn't bring his bat down. So now his bat is sticking straight up like a flagpole. At the same time, F2 goes up to attempt to get the ball. When he does, his glove makes contact with the bat. Ball gets by, and R3 scores from 3B. I immediately called time and go to discuss with my partner. The Question? Was it interference (R3 is out, game ends in tie), or a wild pitch (R3 scores, game ends).
In discussion with my partner, we declared it a wild pitch. The determination that while the bat made contact with the catcher's mitt, F2 would not have been able to stop the ball from getting passed him. That was based upon the F1 already throwing a few pitches in the same area and all of them getting past the F2.
Definitely made for an interesting ending to the game.