Yes: It would take pure faith to believe that something with mass could move faster then C (Speed of light in vacuum) because such a thing has never been demonstrated. It is true that massive FLT (Faster then Light Travel) has never been proven possible. But it is also true that it's never been proven impossible. (But as I said, believing in massy FLT would require faith.)
The reason is that the energy to move a grain of sand the speed of light would be more than all the energy in the universe. In math terms, it approaches infinity.
I would actually be most grateful to learn what it is you had in mind as "a thing which can move faster then the speed of light" (even if it has no mass.)
I am very interested in the truth and in science and have heard of some experiments demonstrating faster then light something or another, but I've never found any really clearly explained. So I'd be just delighted to learn a little more about that!
Also, some time ago as a result of my discussion with LeGrande, I decided to perform the double slit experiment (in the most primitive manner possible I suppose) and while I was at it, I made sort of a photo-documentary of it - you might enjoy it: http://bookcracker.com/mrjesse/double-slit-experiment/
Also, a while back I noticed that Jupiter was shining pretty bright in the sky - so I got out my toy telescope (1m focal, 9 or 10cm aperture, refracting unit, mead) and stuck my digital camera on it, trying various lens configurations.
The results were lousy but at least recognizable:
Above: Just one lens - camera body in place of eyepiece. Jupiter and 4 of its moons.
Above two: Two lenses - the objective and the projector lens from an old 8mm Bell and Howell home movie projector - more magnification.
Thanks,
-Jesse