As much as I like "Geek wins, hah!", I would suggest not modeling this as a good practice for self-employed folks here. It is 2011: GoogLinkedBookTwitEtc have ensured that you have exactly one professional reputation. You may think future clients will see the righteousness of your actions. Consider whether available evidence suggests that you are a good judge of the character of clients.

Come back to this post in two months if you don't buy this prediction: it is highly likely he doesn't get paid.

There are better ways to avoid nonpayment. Work with better customers - reputation works both ways. Get references if required. For projects of nontrivial length, agree to milestones and bill on successful completion. Delivery of functional code should practically always be a milestone, which would eliminate most of the downside risk here. Charge a premium, both to scare away bad clients and to cover the numerous sources of risk to your ability to pay rent, of which total refusal to pay is only one.