As silly as the article sounds, I think the whole debate is fascinating. It's like a philosophy argument. Basically, this collider is going to make "things" that have never before existed on Earth and possibly do not exist naturally in the universe today. The possibility of Earth being swallowed up still sounds silly, but I don't think it's too unreasonable to claim that something bad could happen when you're dealing with such extreme, unfamiliar things.
I mean for instance, if you took a paper clip and squeezed it down small enough it would become a black hole, right? Then the Earth's gravity will pull it in and the black hole would start sucking matter in constantly, as it oscillates back and forth through the center of the Earth until all of Earth was sucked in, right?
Is there any flaw in what I said above? I don't know but it's still cool to think about. When you create weird things, you never know what can happen.