Heck, I'm in the military, and I hear stupid advice all the time.
"Watch that weapon, Sergeant. You'll have an ND and bring down the whole airplane."
"Load nothing but tracers in the bottom half of your mag."
"Growing up as both a Southern and the son of a child of the '50s, I was imprinted with several things that have long stuck with me. The F-86 Saber Jet was the finest fighter ever flown, the National League is always superior, and Leslie Coffelt
was the finest revovler shooter since Mr. Ed."