Asking for a free upgrade, in my opinion, is rude. If you used all your miles for a premium economy ticket...that sucks for you I guess. I HATED being asked for free upgradges working the counter. I was checking in a PDX
flight one day, and a father son duo was connecting on to OAK
. They asked for different seats, but coach was compltetely full, and I told them I couldn't move them for that reason. The father said "All full??? Not a seat left?" I told him coach was booked solid, and there were 2 seats left in first, and he kinda laughed and in an off-hand way asked for a bump, to which I replied: "I can't do it for free, but it would only cost you 50 bucks a person" They ended up turning it down, but they weren't the only ones that asked for a free upgrade...
What alot of people don't understand, is that when an agent does give away an upgrade for nothing, they eventually have to answer some questions. Accounting alerts the appropriate people, who talk to your station manager, etc. And, as EWRvirgin said...If you DO
get a free upgrade, you're talking to an agent who won't be around much longer.