In my opinion, ASC already does enough for the airsoft community. Inforcing this kind of rule would be awfully difficult.
Everything would be hearsay. What kind of proof would you need? Witnesses? Would not hold up in court so it certainly should not hold up here.
If the fields and teams want to take a stand thats awesome, but to ask ASC to govern this is too much. The admins already have enough to deal with. This should be a local matter dealt by players between each other.
What lurks withing your vegetable crisper?