I pulled six months worth of Salesforce code due to a multimillion dollar HVAC client slowpaying a measly $6k because he perceived he had leverage.
Every report, forecast and pipeline tool, the calendar scheduling for field reps, supersmooth UX, forms, and a ton of other custom sweetness was yanked. The next Monday, I peek in to find a new guy was reactivating my work. I booted him, deleted and purged every scrap of code I'd provided, and put a HUGE black on bright yellow box in the middle of their workspace saying PAY YOUR DEVELOPER!
New guy never logged in again, the owner called me screaming in rage over six figures of lost business that day alone, I received a cease and desist from his laywer.
The beautiful part? He did not have a 'work for hire' contract, so I retained copyright to all of my code. I rewrote the cease and desist to state that my code was not to be used in any manner, copied him and his lawyer, and never heard from him again.