[snrmike]

It's kinda tough to say what you'd do in the heat of the moment. This one definitely depends on the judgement of the covering umpire.

Age group definitely plays a role (as much as we'd like to say we call everybody the same).

If the covering umpire is convinced that the contact is unintentional, then nothing should be called.

I do know coaches who coach players do drop a bat right in front of the plate on plays like this. To me, that's intentional. It is very difficult to judge one's intent though. I personally would've ended the inning on an interference play.