You did what you had to do. The only thing I ever take issue with is this. NEVER inform them of the sign issue. As you said they carry no weight in NV and we want to keep it that way. It only gives these idiots from other places like cali to get in on our leg sessions and try to change things. They choose to place the sign let them just think they are doing something.
And if the idiots from cali and red robin read this, well you lost a lot of biz today. Red robin used to be a carry friendly place. We now know they prefer the criminals to be armed but not the honest folks.