Being swept with the muzzle on a daily basis. It deters me from wanting to even be in such places.
I took my wife to the shop I frequent a few years back; a good friend owns it.
She was there to select her own handgun. While there, I left her with the owner to help her and offer advice. Women just don't listen to their husband's in the same light as those unrelated to them, so I left them alone. A county deputy overheard the conversation, and offered her the opportunity to handle his concealed handgun. She accepted the offer. He put his leg up on the glass, and removed a PPK from his ankle, and handed it to her.
She, having been taught to never accept an unchecked firearm, declined. He said, "it is OK, I trust you". She looked at me, as this caught my attention, and I smiled and said, "ask him to unload it". He reluctantly did at her request, inspected it, and handed it back, action opened.
We left shortly after, and she expressed her amazement. "I never believed you when you told me how terribly police handle guns. I thought you exaggerated. I could have taken it, shot him, and left with it. He didn't know me from Adam." I responded by telling her she was right by not taking a loaded gun, from anyone, and that I was glad I insisted on instilling that as a minimum level of competency with her when we were first dating.