Well, here's one. And one I cant advise others to do in my situation, but I felt the area I had to be in justified it-and, thankfully, a LEO agreed with me, and let it pass without incident, but..
Was working an IT contract for a major banking/investment company,recently. They had H.Q'd their regional offices in a office/industrial park area, which was ok itself, but.. nearest places to get gas, food, etc. were a couple miles away, and in a very bad area.
Over the course of a 14 hr shift, running around to several branch areas and back, had run low on gas, and had no time to stop somewhere better to fill up, before going home, across town.
Nearest gas station to the office was smack in the center of an area in which no less than 10 murders/robberies, etc. had taken place, just in the previous week alone. You cant look 20 feet in any direction around there, when the sun goes down, without spotting a half -dozen or so Meth-heads or Crackhead zombies stumbling around.
So, no choice, really, had to get the gas. So before I did, I put my .45 on the hip, where it belongs.
But, OC is not legal here yet. So, was running a risk of a run-in with local LEOs, by doing so, but..
Sure enough, about half-way through filling my tank, a cruiser pulls right up along side me, and the Deputy just sat there, looked at me with one eyebrow raised, and pointed at my .45.
In return, I just waved my free hand in the general direction of the dozen or so zombies wandering about within 30 feet. He looked around, nodded, and "saluted" and drove off.
Could have gone either way, but.. was ready to tell him tough ****, Im having to deal with my surroundings.