In many ways I agree with you, Lazs; nothing more I hate to see than that 35K Lanc headed to my field just as I am enjoying the best kill run I've had in weeks. OTOH I have to recognize it took that guy 45 minutes to get there.
Now to me it is annoying as hell to have him up there, 15K above his published ceiling and with engine performance and maneuverability far beyond what can be done with any fighter in the game, but he is only one plane. The damage he does can be quickly undone, so if he wishes to take advantage of characteristics his plane was in reality clearly incapable of, no real harm done. And, it does give me something else to shoot down when things are slow. If several of them come over with escort, then it is in coordination with their side and once again I clearly can't argue with an attempt to take a field.
If we allow 163's, I dunno... I almost think that crosses a line we shouldn't cross. Don't get me wrong, I would streak away like a shot to train those potato lobbers at those high buffs. Perhaps if the 163's were located around resource targets I wouldn't have a problem, but around every field? I don't think so.
Whether I fly bombers or not I have to accept them as a viable form of play, and anything that makes flying them unviable is to be avoided.