I took on a freelance client four years ago who weaseled his way out of final payment. Since it was early in my career, I could not afford legal recourse and did not want to expose the drama to my future clients.

He ended up using the project to get a job as an investor, and eventually used that to raise a seed round to build a company that will supposedly give accounting and financial support to freelancers.

Fast forward to today, I'm doing great and don't need the money, but my pride is preventing me from moving on mentally. I also have no doubt he'll use his scummy tactics on others in the future and it honestly bothers me that he continues to be successful despite his behavior. I have met with others who have had similar experiences.

What would you do in my situation? Reconsider legal action? Public shaming? Simply move on and chalk it up as a life experience?

Here's the long story: http://pastebin.com/4LB8e265

Thanks in advance.