If they admit it or not most people have some sick fetish or another, it's if we act on them that it's socially unacceptable. The way I see it it's natural to be attracted to any kind of unusual thing.
Pedophilia is a bad thing because our society has said it's a bad thing. The way we view the world is built upon the perspectives fed to us from day one. If our culture said pedophilia was normal then it would be normal, children wouldn't have a problem with it and neither would we. Don't get me wrong I like some loli but I'm not a pedo.
Not very long ago homosexuality was unaccepted but now gay couples can legally marry in California, Canada, etc.
If this trend of acceptance continues then yes, we probably will have pedophilia accepted in the next hundred years or so.
That's my two cents