I mean, making a whole blog post about the situation, and then making the top post of hacker news, just kind of keeps the sniper scope of lawyers pointed at himself.
The intern? Yeah he’s fine. There’s no real consequence for that person other than proving he’s a capable employee who can be a bit obsessive. They should work in a tangentially related area of product for awhile and forget it ever happened. Technical hires who can implement your idea is much more valuable in bulk than ideas themselves.