While you may be fine in this case, be careful with that sort of action. When in dispute with a client, even a deadbeat, you have to be really careful what actions you take. Their failure to pay may well be a breach of contract, but under the law your right to pursue that is in court, not by throwing a brick through their window or interfering with their business.

You cannot cause harm to someone because they stole from you by not paying you. That is not proper, legal recourse.

I have been in the situation where I decided the most prudent action was to "shake the dust off [my] feet" and learn to screen engagements better.