“Voluntarily leave” like an old girl friend tells you to get your stuff out of her place. And why return the value of auctioned items? If the police can keep the proceeds of drug seizure, why not this as well? The first priority spending, of course, should be funding one-way trips back to Krapistan or Mexifornia. Or North Korea, because migrants love options.
I just don’t think it’s necessary to be ruthless to those visa violators who would voluntarily leave peacefully.
Now if their having a fit and causing damages as they feel forced to leave, that’s something else.