Originally Posted by
icurhere2
During boarding - GA's have the flexibility (but not requirement) to upgrade uniformed service members if there are seats remaining after all elites are upgraded, which wouldn't be known before boarding.
And some (apparently in ATL) like to upgrade military before processing upgrades for Elites, and in one case, removing a paid F customer from their seat in order to give it to a military person and then trying to humiliate the F customer on board into allowing it to happen.