I'm going to be devils advocate here. It may be legal to open carry there, however it isnt always the smartest thing. What that guy was doing was pointing out, Hey buddy, if I was a bad guy, you'd be target numero uno. May not happen at the gunshop, but if you were at walmart, or some other store, and a robber can easily see your piece, as it appears it can be seen, you'll get a double tap to the chest before he even says a word. Element of surprise is your friend, not openly showing.