There are no 'industry blacklists' for small consultant developers. And I really doubt any legitimate operation would blacklist somebody for their entirely leg

There are no 'industry blacklists' for small consultant developers. And I really doubt any legitimate operation would blacklist somebody for their entirely legal actions after a contract was broken. If you hire me to build a book case for you, but then you decide to not pay me after the work is done, should I just destroy the book case and hope for better luck next time? Why couldn't I give the book case away for free?