lets be ridiculous and pretend it is possible to go faster than the speed of light. Any man made craft going at that speed hitting something as small as a grain of rice would explode like a nuclear bomb.
Never say never... Luddites like you have always been proven wrong.
-- Albert Einstein, German-born American physicist, 1932
It's always dangerous to say something is impossible.
/johnny
That assumes that the craft itself is moving. The most probable methods of FTL involve the craft staying still, inside a bubble of warped space-time. And the BUBBLE is moved. . . but the craft never changes velocity. Hence, relativistic collisions would not be a problem.
OF course, the specific method of creating and deflating that bubble, and changing the position of the bubble, is the trifling technical details we have yet to solve. . . .
Which is why we use a Brussard ramjet.