I pulled in there yesterday actually. Manager came out to the drive thru and said they had to close down early because they lacked enough employees to properly serve that fourth meal!
The metal detectors are more for show and the "sense" of security.
Half the people set the metal detector off and they'll just ask what it is and say ok...too long of a line to really do thorough checks.
I'll often watch Doug DeMuro on Youtube review all sorts of cars. He's pretty entertaining and has a large variety of cars he reviews. He has about a million subscribers.
I was a little shocked when I clicked on him reviewing a $400,000 Lexus in a UND Fighting Hawk tshirt.