[Turbopilot]

Depends on the state. In mine, they have no legal force (unless posted someplace carry is illegal regardless of signage). You can only be asked to leave, and theoretically arrested for trespassing if you refuse.

In Nebraska, and I believe some other states (Texas is one), signs that meet certain standards do have force of law. You could be arrested for illegal possession of a firearm in a place with a properly posted sign even if you were otherwise legally permitted to carry.

[P8riot]

Here in Virginia if you carry somewhere that is posted, and you are caught, you can be asked to leave. If you do, no problem, if you don’t you can be charged with trespassing.

[smoketree]

What I would like to know is where they get the notion that a constutionally protected right can be violated.
They don’t ask to remove your vocal chords so you can’t shout fire in a theatre.

[rjsimmon]

In Nebraska, and I believe some other states (Texas is one), signs that meet certain standards do have force of law. You could be arrested for illegal possession of a firearm in a place with a properly posted sign even if you were otherwise legally permitted to carry.

Interesting point. Does the mere fact of a posted sign override a Constitutionally protected right? For instance, can a sign deny the right to free speech?

This may seem a far stretch, but appears to be hard to defend in the extreme.