Then some idiot (ME) will ride off with it in the wrong position and burn up the motor while I am idling along in traffic.
No, silly, of course it would be fully automatic. The bike knows if it is moving or not. A simple click of a relay tied into a signal of moving/not moving, should be all it takes to reverse the fans with no user intervention. Although I think an ambient temp sensor would make it that much better... for example, under 70 degrees, don't reverse. I am not sure the fans would be AS efficient at cooling running backwards, though.
I'm not trying to be a jerk here. But it seems like we (cyclist in general) focus on the the fans kicking on too much. I have NEVER worried about sitting in traffic in my wife's car and having the fans kick on.
When you are sitting in a car at a stoplight you are chillin' in an air conditioned vehicle. It is not all the same as sitting in 95 degree weather, wearing full protective gear, in direct sun, no breeze, with your fans on and blowing very hot air backwards around you! Or worse, being stuck in a traffic jam for an hour, creep/stop/creep/stopping (I thought I was going to DIE once doing that).
We are not worried about if the fans are going on or off to cool the engine, some of us are just irritated by being blasted with hot air. Hence, my thought of having the fan blow the other way when not moving. Seems to make sense to me, anyway.