Leave it up to the employer to decide.
“Leave it up to the employer to decide.”
Agreed, with one caveat: If some nutplace shoots up the business and it can be shown that the place was chosen at least in part because the nutcase knew his targets would not be armed, the employer should be subject to liability. Decisions have consequences. The decision to disarm people automatically makes those people more vulnerable, so that decision should carry the risk of liability for doing so.