I had an employee, Bob, that just literally stopped coming to work one day, without technically quitting. Bob would then show up once every week (or was it every 2 weeks...) to legally maintain that he had not abandoned the job. Bob'd just sit at his desk for half an hour and then leave with a random excuse. When I confronted him he said that he wanted to be fired, so he could get severance pay...
I eventually discovered that Bob had been "borrowing" company funds and had failed to return them. There were receipts and witnesses (a supplier whom Bob had told payment was pending, after Bob removed the allocated funds from a company account). Bob then ceased appearing in the office and offered (by phone) to return the "borrowed" money, if and after I would grant him severance pay. Those who are fired for theft or fraud are not entitled to severance pay, as I understand matters.
Bob still has the audacity to list my company as his former employer on LinkedIn.
While I am largely on the side of protecting employees from unscrupulous employers, there is something to be said for having that shoe on the other foot.