My company has a "policy" against firearms on company property. I believe that for visitors, all it means is that the person will be asked to leave, and if they don't leave they can be charged with trespassing. BUT, what about an employee? I know that employers can "fire at-will" for anything, but employees can also "sue at-will". I'm just wondering if a person who was terminated (or even disciplined) because of the "no firearms on company property" policy would hold up if challenged?