I concur. Lots of people aren't hobby lawyers; they just assume that if they don't do anything evil, they won't run too far afoul of the law. For example, lots of people wouldn't even think to ask if there was a problem if granddad in WY gives his favorite deer rifle to his grandkid who is visiting from MT. For that matter, how many people reading this think it's legal to pick up a blue jay feather off the ground and stick it in their hatband?
I think that logic works fine for the average gun owner, but not someone who has a CC license. Just the very fact that you have a CC license and carry means that you really should have a working knowledge of where you can and can't go. Not only was this pounded in my head during my CC class, but there are so many places that it is a felony to go, that it would be foolish not to know this information.