All
Even in the circuit, positive identification of other aircraft is somewhat tenuous. The difference betwwen RV types is not obvious for example. A highwing IS a Cessna unless you happen to know who it is and that he flys a Cub..or perhaps that's just my eyesight?
The general concensus early in WWII was that the average pilot could not distinguish between a Spitfire, Hurricane and a Messerscmitt...as many embarrasing gun camera films show. The only saving grace being that the average pilot couldn't put rounds within 200 feet of what he WAS aiming at!!
The claims for WWI show an alarming rate of misidentification but this has not changed in any conflict since (to my knowledge). There is an overwhelming temptation for every enemy aircraft seen to become the current boggie man. Most Luftwaffe pilots reported being attacked by Spitfires...after all who would possibly admit to having trouble with the humble Hurricane
So don't be two hard on them.
regards
Darryl