Yeah, but do you realize how many consequences that would result if we had a ring? You would essentially have millions, perhaps billions of rocks speeding around the Earth at hundreds of thousands of miles per hour. Spacecraft would have to avoid the rings, otherwise, it would be like going into a hail of bullets; any of our current spacecraft or satellites that wandered into the rings would be ripped apart. I'm also worried about micro-meteoroids that stray away from the rings, because at 100,000s of MPH, those are essentially bullets (remember Mission to Mars, and when the spacecraft was pelted? Yeah, you don't want to get hit by micro-meteoroids). And if the rings were around the equator, it would be nearly impossible to build a space elevator, unless you can build it below the ring, and you can still get cargo into orbit. I think this would also make geosynchronous satellites difficult, unless their orbits were either below or above the rings.
I'm no expert about rings, so someone correct me if I'm wrong, but as awesome as they would look from, say Luna, and as cool it would be to see them from the ground, I'm not sure they would be worth the trouble they could cause. Though on the other hand, I suppose that any race that evolved on a planet with rings would adapt their space program to address the problems that the rings would cause. But it might slow down their progress into colonizing space.