Just to add my opinion (for what it's worth)...
Having 1 plane (or 10 for that matter) flash a non-target base in an attempt at deception to draw defenders away from their patrol zones, should never work. As has been stated many, many times before, the targets and time restrictions are published for all to see. If a non-target base is flashing, then defenders are fools to leave their station to go chasing after it. But then again, lots of people are hungry for a kill and will do stupid things in an attempt to find one. At the very most, perhaps they would adjust their patrol a little, but should never leave their assigned defense zone until positive ID is made on the attacking force.
So, as long as people starve for kills and can be coaxed into leaving their patrol area by flashing a non-target base, I say why not do it?
On a personal note, I was in a P38 tasked to escort bombers to a Grunt facility. We came across the enemy defenders and engaged them. Our orders were to force them low and/or away and to not chase them down to where we could no longer defend our bombers. I didn't get any kills that sortie - smoked one baddie who rtb'd - he was out of the fight and I count that as a success. I tried to stay with the bombers and on the way back home I was one of 2-3 fighters keeping an eye on 4 bomber formations to make sure they got out of France safely.