That was a pretty bizarre situation!
I've never had anything quite like that happen, but probably 10 years ago or so I just started keeping a gun on me while checking targets, etc. In addition to that, I also keep any other arms that are left on the table unloaded. It just occurred to me that instead of someone checking out your guns while you are downrange (which really irritates me, but fortunately is rare), they could easily use them against you or steal them.
Probably a good thing for all members to consider. Imagine how it would feel for any of us, as responsible gun owners, to have one of our guns used to harm someone or commit a crime.