If you think that all religion is invented, there's plenty of evidence man is still being inventive. Ever hear of Scientology or Heaven's Gate?
Lest we forget this guy
Bad example: practically everything about Mormonism (even - especially - the weird stuff) has precedence in tradition; Joseph Smith was just the first to make an organized religion out of it.
Actually, I'd be interested in hearing what our resident Mormons make of that fact, given that certain important figures in the LDS tradition did not shy away from the connections between their faith and, say, Freemasonry.