It has been my experience that those who think the rules apply to others for their safety, and do not apply to them because they are smarter than the average idiot are the ones with the highest rate of dumb ass accidents, and were the ones the rules are made for in the first place.
MS45,
The doofus vendor was from Arizona. For your info, many of the vendors at those shows were from outside California, as far away as Pennsylvania. Many of the buyers were from out of state, too. It was one huge show!
Also, I don't live in Los Angeles. Since you seem to be geographically challenged, perhaps I should point out that the LA County Fairgrounds is in Pomona, east of Los Angeles. And I live about 50 miles from LA. Whenever I go there, I take two knives and at least one gun. Oddly enough, I can carry the handgun concealed, but the knives must be exposed. Go figure.