I OC all the time. (except when I have my winter coat on) Have a few problems now and then. Last time was at Cabela's With Turnandshoot4 a month or 2 back when we did an OC lunch at northwoods up north here.
Ive seen a few people OCing, most memorable would be seeing Prometheus's wife Juanita OCing in walmart, giving me the stones to do it myself.
And an older guy, mid 60s to early 70's walking with his cane and wife in (where else?) walmart. He had a Colt 1911 cocked and locked in a nice leather shoulder rig.
I would've love to had seen that older guy with the shoulder rig