You could always create a custom arena, disable F3 for all hangars, then challenge the guy you think is using F3 and beating you to a duel and see if he still wins... You may be suprised to see that the A20 has decent views and is still a very manuverable buff that's still a huge threat.
You'd do better to learn the moves that telegraph their lagrolls and hammerheads and how to defend against them. F3 is a tool, but without a skilled pilot, they just get a better view of their plane going down in flames.