I've killed many a would be vulcher coming down the runway for a HO shot while newly spawned or on ground roll. 110s, Hurris, Il2s and B-25s have a pretty good chance against this attack, doesn't happen often.
If that's the case, of map room camping with bombers when the m.r. was on the field, shouldn't it be revisited now? Even if bombers were used for airfield defense that should be acceptable. Bombers on the runway would still be very vulnerable.