Well none actually, since the company lacks any enforcement mechanism the only thing they could do is to ask you to leave the premises. IMHO
I think this point is a little vague. I suppose it depends on the laws of the state you live in. If it's written into law that your permit does not allow you to carry in a business that forbids it, they might choose to call the police on you rather than risking a confrontation themselves. Then the police would have to enforce the law.
I don't have a permit, but I'm taking the requisite classes to get one this weekend. I'll probably understand what I can and can't do after I get the training, which is state-specific.
Not so. In some states, the legislature enableing CCW also criminalizes carrying in zones where the owner has posted no-carry.
No. In Texas it would be a class A misdemeanor which can mean up to a year in prison and a $4,000 fine. At the minimum, lifetime revocation of your CCL a fine and probation. Misdemeanor clarification: In Texas you are ineligable for a CCL if you’ve been convicted of a felony or a weapons related misdemeanor.