What part of "cold range except for the firing line" don't you understand? Virtually EVERY range I've ever been to has that rule, and for damn good reason.
Also, it's a GUN SHOW. People are handling things. That "no loaded guns permitted" is ONE MORE on top of the four basic rules, and it's there for SAFETY. How many times have you heard of people having unintentional discharges at gun shows, because some doof left a magfull in, something like that? I've personally witnessed one, and they don't have gun shows in St. Louis anymore because of it...
Sheesh - Next thing, you'll be calling for a boycott of KCR...