Note that I'm not a professional lawyer, but even if you had all his personal details it would be really difficult to persuade the prosecutor to press charges. Why? Because you admit that he didn't know of it being a scam, so his intentions were good, and there's a chance he also got scammed, so he's a victim, like you. His only fault was spreading the word, but this is natural for someone excited and full of confidence in the scheme. Technically, I'm spreading the word about yolodice in my every post, but am I responsible for their every move? No. I could tell you now to go play there, because I personally find the site to be fair and legit, but the code can theoretically be modified, or they can at some point in the future decide to run with the money. Should I be held responsible and sued?

Imagine that you invest in something and tell everyone you know about it, just like I'm telling people around me about bitcoin, and this investment happens to be a big scam. Should the court find you responsible for other people's losses? In such case it would be possible to sue TV stations, newspapers, advertising agencies, graphic artists, even actors who play in ads.

The justice system is unpredictable at times, but there are cases we can use as examples. One of such is the one of Bernie Madoff. He had a special room where the scheme was being run from, and people inside knew the details. He also had a company in which he employed people who had no idea they're participating in a massive fraud. The employees of the company were never charged, even though they took part in finding clients and promoting the company. They were being fed information by Madoff and acted on his behalf. They also did not profit from the scam.