Interesting topic.
I've scoped 3 people carrying concealed here in San Diego in about the last year. FYI, it's almost impossible to get a concealed carry license.
First guy was at a park with his kids. It was 90 degrees and he's wearing long pants. He and a bunch of other parents were at a kid's birthday party. Something about the group (sorry for the stereotype, LEOs) screamed "COPS!" Anyway, his pants were too tight around the ankles and I made out his roscoe in an ankle rig. The whole group was LEOs (no uniforms, but I know what I know) so I wasn't too concerned.
Second lady had the classic black "tactical" fanny pack. Bianchi, I believe. Not 100% sure she was packin', but my gut told me she was. Not too smart, really. Those things stick out like a sore thumb (to me anyway) and with a little close observation you can confirm they're not an ordinary fanny pack. Will probably fool 95% + of the people, though.
Third guy had a "wanna be" look to him. Once again, 90+ degrees out, he's wearing pants so big around the waist they would have fallen right to the floor without a belt. On top of that, he's got the classic "look at me, I'm carrying" photographer/fishing vest on. I followed him somewhat around Costco until I saw him lean over at the waist, confirming my suspicion. He didn't print per se, but the "bulge" was definitely there.
I wasn't too riled about any of them, but it makes you wonder how many are uh... how shall we say? Disregarding unConstitutional laws here in the PRK.