Pro bono and is short for "por bono publico" latin meaning "for the public good" and is generally used when providing legal service free for a good cause.
The American Bar Association (ABA) has set forth a lawyer�s pro bono responsibility in Model Rule 6.1, which encourages lawyers to aspire to render at least 50 hours of pro bono legal services per year without fee or expectation of fee to persons of limited means or to organizations designed primarily to address the needs of persons of limited means.
Thanks for caching a copy. Merkey's really good at generating reams of legalese, so that the filing looks "credible" to the untrained eye (i.e. MOG), but he doesn't cite any case law, he just claims Defendants have violated just about every last bit of the Bill of Rights, short of quartering soldiers in his home during peacetime. (That's the Third Amendment, btw). I have a funny feeling the courts are going to find that rather, um, insufficient.
Assuming he's actually going to do anything besides bluster and threaten people, anyway. So far as anyone knows, he *still* hasn't actually filed anything, correct?