Just out of curiosity, were they Americans or Isaraelis?GA law requires specific and individualized notice for criminal trespass purposes. I have not been able to find a single court case where the mere presence of a sign constituted such specific and individualized notice under my state's law. I suppose that if the prosecution could prove that a person read such a sign, understood such a sign, and then willfully ignored such a sign that a valid legal argument could be made; however, if the response is "What sign?" there is simply no case for criminal trespass. If a person carries into an establishment posted as "no firearms", it is not a violation of our carry laws. If they refuse to leave after being told to do so by an authorized representative of the property.
I fully realize that the law in other states is different.
GA statutory law (16-11-138 OCGA) also states that if a person who is carrying illegally uses their firearm in lawful defense of self or others that they have an absolute defense against the carry law violation.
Again, I fully realize that the law in other states is different.
As for private property rights, I have the absolute right to restrict access to my property for any reason. I have the absolute right to restrict access to my property for no reason at all. Then again, my property isn't open to the public.
I did once bar all employees of a certain publication from my property after they woke me up from Sunday afternoon nap by knocking on my door and trying to sell me a subscription for the umpteenth time. It was one of my finer moments. I chased down the van carrying all of the "college students trying to earn some money" (none of which had an actual college ID) so that they could all be served specific and individualized notice.