I'm assuming that we're generally talking about OC'ing here? Or are people saying that they'd respect the sign and not CC? If one was CC'ing properly, no one would even know, correct?
8 more to go.
Yea, mostly open carry. Pretty much no one will know if you CC but there are people really good at picking out people who are concealing (most of them though carry themselves and would have no desire to out you). However, its almost always impossible to know for sure without asking the person to lift their shirt or whatnot. If I was ever asked that I'd leave right away regardless.