You're freaking out about someone you met on an internet forum who hasn't posted in 6 months, but he's the weirdo. Time to spend more time with your families guys.
One of the things I've remembered about him was the severe anger he held towards others online. I've heard stories of him literally threatening posters, finding personal information about them online, and letting their supervisors/bosses (who knows how he got their information) know about their posts that they had put on here.
Truly crazy.