On: I didn't get paid, so I open-sourced my client’s project

[rangerpolitic]

> Surely the guy not paying is the unprofessional one?

Surely, both people in the relationship can behave unprofessionally.

> How is cutting your losses and walking away (but outsourcing the code you wrote) unprofessional?

That's not why people are suggesting the developer is unprofessional. It's because he's complaining about a client publicly.