Okay, I have gone back over various sets of safety rules for handling guns. None of them rule out costume carry, Halloween, or theactrics.
I guess we need to inform all the re-enactors about how they can't be using real gear anymore as they definitely handle guns as part of costumery and theatrics.
...and tend to make some of them up as they go along.
And apparently, we are making up new rules as we go along as well.