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."
NRA Life Member
"Had King Kong showed up in Texas, Frank Hamer would have taken him down with his Model 8 in .35 Remington...well, he was kind of big, so maybe his BAR"