Don't let fear paralyze you. If those pushing the boundaries censored themselves based upon the fear of being persecuted in the future, we'd have no progress.

As far as I know, as long as they don't host any nodes with illegal content, they shouldn't get in trouble just for publishing the protocol and the client protocol and servers. Otherwise, the inventors of tcp/ip, http, bittorrent, telnet and more would be in prison.