15-20, i've sat that long in a gv watching a map room.
Not touching anything? Not poking the map? Not clicking on anything? Not moving your view? Not typing anything in buffer or using vox?
The thing is, autokick is not going to stop the guys who are using it for the precious win the war perks.
The problem I can see with people in tower not counting toward ENY is, people could sit, once they're not getting ENY anymore, a couple could launch say, low ENY bombers, then the rest of them could up and as their numbers start being counted, the ENY starts ramping up, but they still get more low ENY stuff in the air than it would've if they had been counted all together.
Although, thinking about it now if people were so inclined, they could get the same effect coordinating on discord and logging out and back on. Maybe since that doesn't happen, it's not that much worth worrying about?
Wiley.