Yeah. That's how it worked. The guy at the store was only concerned that the screen wasn't broken.
The one that was bricked wasn't when I initially took them in to swap them out. i had to wait for new ones to come in. I think I took them in last Tuesday, or Wednesday, and the new ones came in on Monday.
I bricked the one trying to run DirtyCow on it in the meantime. The screens were both twitching, and jerky when I took them in. It was obvious there was something wrong with them. He didn't even try to turn them on when I went in to pick up the new ones.
He had me pull the sim cards out, and swap them myself. He even asked which ones were the old ones afterwards even though the 2 new ones still had the stickers on the screens.
I really don't think they care at all. It isn't a franchise store though. I would guess they would be tougher to deal with.