I understand game play, and I think its sad that players would jump into M3s and run to a strat to await the incoming attack instead of jumping in a plane to fight off the attack. You dont want your strat bombed DEFEND IT!
With most bombers flying around at 30k these days it's no use trying to intercept them. If you want to start a fight with your bombers, FLY AT UNDER 20K.
Of course, HTC could force more fights by making bombing accuracy from 30k historically accurate - that is, with an average error measurable in miles. We could keep the current laser guided bombs for altitudes below where wind starts in the game, i.e., 14k. At 14k you're a lot more likely to have to fight on your way to and from the target.
I've had no trouble at all getting a response flying around at 5k or less in B-17s. People love to attack bombers. They just hate to spend 10 minutes or more climbing to chase buffs they'll probably never catch anyway.