Once I managed to lock and fire a R-27ER at a friendly from close range, with full LA and no friendly marker on the hud. Also, the bogey appeared as a bandit on my hdd, and had music off.
It takes some severe grovelling to pacify people whn you do that to them.
Someone mentioned it may have been the angle of approach to the bogey not letting the iff interrogate. Also, I used weapon launch override in a previous plane to launch heaters when I was hit, but I bailed and this was a new plane.