Camping follows the script
He must really believe in what he's preaching. No con man would come out before the world with such a trite, hackneyed cliché and expect it to be taken seriously.
But will it be taken seriously? Are there really people out there who won't think, "Wait, this guy was totally sure about May 21 and he was wrong -- so maybe he's wrong this time too"? After such a build-up and let-down, will they let themselves be fooled again? Based on past cases of apocalyptic cults, some of them likely will.
If so, and if in October they insist on going through all the same rigmarole with the billboards and signs and quitting jobs and all the rest of it -- then verily I say unto thee, yea, there shall be such mockery and ridicule and snickering, as has never been seen upon this Earth before, and it shall serve them bloody well right, amen.