He stated his son was told this when he began working at a theater.
I guess there's no law against lying!
I regularly listen to Tom Gresham's Gun Talk podcast, and I can't tell you how many times a trucker (they often seem to be older) will call in telling him it's against the law to carry in their truck - he's covered this so many times I'm sure he's 'bout to pull his hair out.
As he's repeatedly told them, there are no laws / DOT regulations, etc that state it is against the law to carry in their truck. A number of them want to argue with him, but when push comes to shove, it's always the trucking company, driver training company / manual, etc that has given them this false impression (I think one person that knew better stated he was actually lied to by someone along the info chain).
The ones that don't want to accept his answer (and he has researched it) usually hit a brick wall when he asks them to tell him what law /DOT regulation / statute, etc they are violating.
Sounds like the same thing that's been going on in the trucking industry has now made it to the theatre industry?
BTW - last week there was a new twist - a trucker called in and tried to tell him under some of the new Homeland Security laws / regulations, etc, you could not carry an explosive projectile in the cab of the truck, so guns were out under Homeland Security. Tom called BS, but said he'll research it, but unless you're carrying some kind of special .50 cal (explosive) round etc, normal ammo does not have an exploding projectile, so some kind of law / regulation against exploding projectiles in the cab (if there is one) should not affect guns in trucks.
I don't know if some folks are just cornfused, or if there is possibly an organized effort (consultants?) to confuse folks with semantics regarding things such as guns in OTR trucking?