[AtlUmpSteve]

For discussion purposes, let's consider the rationale behind the rule(s) in question.

The general rule of delayed dead ball rather than immediate dead ball is to not keep the offended party from a more favorable result. We also signal/call the offense when it occurs, so that the offending party realizes and isn't "tricked" into providing a more favorable opportunity. In that way, the balance between offense and defense remains.

When dealing with a "defaced" ball, or one with a "foreign substance", that adds an additional factor, one of potential safety. If you knew the ball had an illegal substance applied, and the ball got away from the pitcher (or a subsequent player) and a serious injury resulted, there is every possibility (and likely argument) that you, knowingly allowing that pitch, contributed to the cause of injury; folks, that's called liability, contributory negligence, and other legal terms I'm not wanting to hear applied.

Well, NFHS doesn't want that, either. In this specific case; you know a ball is "dosed", they want you to stop the pitch from happening if you can. No other form of illegal pitch relates to safety, they all amount to gaining an unfair advantage.

Get a bat removed as soon as you recognize it; do the same with an unsafe ball.