Everyone invested in pirate has an interest in finding out about him, just in case..
Even people which are not invested with may have an interest in Pirate being legitimate and honest in his business practices, as it is directly linked to the reputation of bitcoin and the whole community. I would not like bitcoin to be labeled as an unsecure scam ridden project, doomed to fail for its vulnerabilities to hacking and scam schemes. I know better, but it is hard to explain to the rest of the world if all they get from the media is the catastophes.

Also, pls digg some more into the seeming information you found on Pirate, it is hard for me to believe, that someone with a couple of million of borrowed dollars sitting in his chest lets such information laying around for everyone else easily to find. Especially, because he is so secretive with all his business in general. Maybe try to meet him at his home address, call his phone number and see who answers, or seek some confirmation on his birth in local registers, because it would be highly naive to believe anything you happened to find on Google.