He lied.
I don't think so. He had clear vision about the future of GLBSE. Problems must came after the conference.
No he didn't. It needs 4 glbse shareholders to decrypt the database backups in the event of nefarios death. There is nothing in place prior to this in case nefario was lent on by the government and the 4 shareholders disagree on whether hes been compromised or not.