There is no amount of apologetics that can justify a signage law. The burden of proof will never be on the property owner/manager... I would compare this to a no trespassing sign, doesnt allow you to enter on the other side of the property. Shrugging it off makes things worse, if this law is rammed thru it needs to be immediately repealed continuously until it is. The very idea of limiting a right, on public property is a direct infringement of the right.