Not sure about the make-believe part.  In 1983 I was a weapons
control systems mechanic on F-4Es at Moody AFB.  I had a 4 year Weapons
Systems Officer write in the aircraft forms, Radar does not work in 
O.F.F. mode.  Took me about 5 minutes to figure out wtf he was talking
about.
     The power switch had 4 "modes", Emergency, Operate, Standby and
OFF!  I decided not to enter could not duplicate malfunction in the forms,
so I asked the next WSO how the dar operated in off mode.  After a weird
look, he told me it worked fine in off.
     I then entered Replaced Stick Actuator in the forms and went back to 
the shop.  It took the production supervisor 5 hours to find the fix and call
me on it 
 
 P.S.  Stick Actuator=Operator