Do they patrol for this? I have ignored many "gun free" signs as (currently and in Oregon) until they ask me to leave and I refuse, ignoring that sign has no legal ramifications. I will usually keep it concealed at that point, and I will try to find alternative locations to do business if possible, but I won't overly restrict my life because of others expressed preferences. If they catch me and choose to ban me, I will respect that ban, but such signs/regulations are often created by a small number of busy-bodies and may not reflect the bulk of the other employees, much less the customers. In the end, freedom is a choice, and as long as I'm not committing violence against another or their property, my conscious is clear.