They all do it. A little anecdote:
I knew a guy, he had fifty bucks in a checking account. He moved. Stopped getting statements at the new address. Just a flaky guy.
Bank charged him $4 a month because he was under the minimum. He eventually went into the negative, and started getting $25 overdraft fees every couple of days.
Eventually he was in the hole for like $4000 and the bank took him to collections. He told them to flake off, he wasn't paying it.
The bank, and it doesn't matter which one, considers that $4000 debt an "asset", and a "good" one at that. But then there'll be a crash and that bank will go crying to Congress about how they need a bailout for what they suddenly discovered is "very bad debt."
Did the guy do wrong by lapsing his communication with the bank? Absolutely. Did the bank "earn" that $4k? Legally, yes. Morally and ethically, very doubtful.
This happened after my mother passed away. She had an account with Wachovia that was supposed to be closed per communications with the local branch she dealt with.
They didn't follow through and apparently, for whatever reason, the account remained open - even after the money had been withdrawn and the account "closed".
One year later as the estate was closing, the attorney I hired to handle the estate received a letter from Probate Court that Wachovia had filed against the estate for around a thousand dollars or so ((supposed debt from "overdraft" due to minimum account amount not kept), attempted collections, attorney fees, etc.))
I had to drive from a few states away, show the attorney all the notes (which he copied), sign papers (affidavit) - and then he replied back to probate court with all the docs and such.
In the meantime, the debt went up even more. In the end, the Judge in Probate Court disallowed the charges from Wachovia and the estate did not have to pay all the ridiculous charges (at this point around $1,500 or so, IIRC).
Even though my mom's estate "won", it still cost around $1,000 to win against the bogus charges (not including my time and travel expenses). It would have been cheaper just to pay them to go away.
ANYWAY, Back to car loans and people "turning in cars"....
And don't even get me started about the local government that did the same thing with an "ambulance ride", that never happened either. We just paid it to get it gone.