Well, one option I've not yet seen is what they did back in the old Air Warrior days....They had no killshooter in the early days and if you shot a friendly, you got PNG (Persona Non Grata) for 24 hours. Meaning, if you shot someone down you were precluded from spawning in anything for 24 hours...you might as well log off and come back the next day. That is the only way that a no-killshooter arena would even remotely work. Personally, killshooter doesn't bother me and neither does the ENY. If the P-47M isn't available cause of the ENY, I'll fly the D40...if it gets too high for the D40, I'll fly the D11...If it gets higher than that, I resort to the P-38G or the 190A-8 or in extreme cases, the Spitfire Mk. I.