Even though Im on several of those websites (I am no saint) I agree in theory with letting people run sites like them, but ONLY if the mugshots are kept updated with the final outcomes. So if someone was arrested under half a dozen felony charges, and wound up with a single misdemeanor as a result, the site should only list the misdemeanor.
From what I can tell, these guys didnt do that, and instead just left the initial charges up. What you are arrested for is quite often everything the police can toss at you so something will stick, not what you will actually be prosecuted and be found guilty of. Seeing as how they werent updating the site, it IS extortion as they are forcing people to pay for removal of false information in a sense.
All in all, fuck these guys. Let 'em burn.