I don't think we can "do" anything about Harold Camping -- as I said it would be funny if not for the trouble he's causing people like here in this story.
One can only teach people and publicize it in the media that people should pray and live their lives like each day is their last.
While I was a teenager back in '94 too, I've been interested in Eschatology since I was about 8 or 9 so I remember distinctly the swarm of conmen that came out around the late 80's and early 90's. The first Gulf War stirred up a massive number of them, to be honest, and it's taken years for the commotion to die back down and serious study to resume. There's been some good come of it, as more believers are prone to check the teachings against Scripture now, but that's if they don't reject it out of hand completely. Camping was a minor player back then, but unlike most of the rest of them, he just didn't take the hint.
Honestly, at this point about the only thing that would surprise me would be for God to not take him due to the amount of damage that he's done to God's name. I'm not wishing death on the man, but I wouldn't be surprised to see him drop dead of a heart attack or stroke any day either.
One thing that you did say though cannot be repeated enough. Even though we may disagree on the End Days or other aspects of the faith, we can all agree that we are commanded to remain faithful in prayer and to live our lives as if it were our last day on Earth. Like the saying goes, yesterday's gone and tomorrow's not promised so live for the Lord today.