what's the point of concealing a weapon? not trolling btw. isn't half the "safety" of guns the fact they're a deterrent?
depends who you ask. If the gun is showing, and a robbery starts, it's likely the guy sitting at his table eating a hamburger with a gun on his hip is going to get shot first. Better to have that gun concealed... if you choose to use it, it's a complete surprise to a bad guy who believes the room is full of sheep.
if your gun shows, you'll have a big target on your head. Better to shriek and duck with everyone, unsheath your weapon, and plug the bad guy in the back.