Absolutely. My personal favourites include:-I mean to this extent where some pilots have 0% accuracy
RAF - A sargeant pilot who had a lot of claims in a Hurricane. He was never promoted
IJAAF - A pilot who made so many claims for one combat his fellow pilots basically disowned him
USAAF - A squadron of P47's were about to be bounced by 109's. RAF saw what was going to happen and attacked first. Their thanks was to be attacked by the P47's. The Tempests ran chased by the P47's who continually fired at long range. When they landed not one Tempest had been hit at all and the USAAF unit were allowed 13 kills for the days work. ) I admit that this is my personal best)
Luftwaffe - A unit that had a number of concerns raised over the number of claims some of the pilots claimed.