Apparently the guy who made this ARG is a complete dick!
He doesn't seem very popular on that ARG forum.
There's a list of stuff that he's done to piss people off as part of the game, including hacking websites, threatening and insulting participants, posting images without permission and a load of other stuff (a lot of it was illegal).
So yeah this is definatly an ARG, the creator of it is well known for pissing people off and breaking a lot of rules :)