It only feels bad because you (not saying you, but you know what I mean) thought you were getting away with getting something for free you didn't pay for and it's being taken back.
If I buy a traditional car that accidentally came with a premium feature, is the cardealer going to come to my house and rip the seat out?
These buyers were informed upon taking ownership that this was a trial. No mistake or accident happened.
They shouldn't have given it to the people in the first place.
I'm wondering if when the customers were handed the keys though if Tesla let them know about this "free trial" of sorts.