I don't think it would be appropriate to start another thread on the subject. So I'll post my opinion here.
Would it work if we had the ability to check a box (like we do to say "AFK") that would take us off the ENY list. Creating a new category. Inflight, in tower, and AFK. If you have no movement for over 10 minutes you are considered AFK (if you are not in a gv, manned gun or in flight at the time, like in a 2 hour climbout). When you come back to the game, you uncheck the box, so now you are back. Then, you must wait up to 10 - 30 seconds before leaving the tower so you can be re-calculated into the ENY system. So it would treat you as though you just logged on/in.
When the player has no movement for 10+ mins, it will give a pop-up (akin to the alt-f4 popup) that says "You are regarded as afk (brief explanation of the above), uncheck the box provided to be able to fly again.