According to Wikipedia , ‘Rule 34’ is an ‘internet maxim which asserts that Internet pornography exists concerning every conceivable topic.' We think there should be a ‘Rule 35’ for Facebook groups. If you've ever thought about a thing, there's probably a Facebook group dedicated to it. Most of them have only one or two followers, created solely to serve as the punchline of a joke. But some of the most absurd groups inexplicably have hundreds of thousands of active members. One of these groups …