I've really dug myself in a hole at the gamestop near me. I occasionally preorder a game because the guys are nice there and I know it helps them. One time, the guy reminded me I had an open preorder for something and I said I didn't want the game, but I'd move it to something else because he was cool and I know they have quotas and stuff. He was really surprised by this, thankful, and all that. His co-workers overheard this too, saw them noticing. I don't really ham it up or get super friendly with anyone who works at the store, despite them clearly recognizing me every time I go in and me knowing them, which I feel is a little weird, but whatever, I just buy games there and know enough to be mindful about the preorder process because I've been shopping at gamestop/funcoland since I can remember.
so I went in yesterday to buy ME2 and a $20 PSN card. This clerk was one of the ones who overheard me in that previous story. He told me they might have a code for the game I was gonna get on PSN and I was like "Nah, you definitely don't have codes for the P.O.W:Prisoner of War Mini and besides, it's not out yet." and he's like "all we have is a listing for the PC version, maybe they did a spiritual sequel or something." and I was like "that's not it, I don't think SNK even makes PC games...this is an 80s double dragon clone and i'm probably the only person in the world looking forward to it." I'm just trying to clarify, but it takes a nerd war tone when he apparently didn't appreciate being "shut down" or something and gets grumbly about it.
To pay for part of the transaction, I canceled a preorder for a game and he just went cold for the rest of the transaction, ending with "have fun" in complete dead pan.
I guess he thought I was doing that on purpose.

moral of the story: don't ever be nice