No business can legally decide who they can and cannot do business with until the politically correct police state determines what moral influence has been considered in such a private decision.
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You may have a point here, it is possible that Walmart could take you to court and with a liberal judge win a case. With an intelligent lawyer however I think Walmart would be liable if they tried to remove you from the store and you weren’t doing anything wrong even though you did something wrong before.
It’s been a while since I looked it up, but in Florida, the mere presence of a posted “no guns allowed” or “gun free zone” sign by itself is “unenforceable”. Open carry isn’t allowed in Florida with a couple of exceptions that don’t apply to this issue.
Anyway, in the book “Florida Firearms - Law, Use and Ownership” by Jon Gutmacher (and I don’t pretend to represent his views or proffer his advice, he is also an attorney), he gives some pretty sound information. Florida’s laws specifically list the places where guns are prohibited... there used to be thirteen of them. Gutmacher pretty much said that the sign is unenforceable as a matter of law, however, the business proprietor, if he discovers that you have a gun, concealed or otherwise on your person and have decided to ignore his/her sign, may ask you to leave the premises. At that point, Gutmacher pretty much recommends that you not even so much as exhale forcefully in the direction of said proprietor or blink or roll your eyes, just leave the premises as quickly as possible. To do otherwise is to invite the police to come and haul you away for “aggravated trespassing” or some such nonsense.
If you’re capable of concealing your weapon so that there’s no issue, then you’re okay. Just conceal it and keep your mouth shut.
I highly recommend Gutmacher’s book to anyone who carries in Florida... it is a most excellent reference source.