Don't be silly! Of course we will be able to travel faster than light.
No one thought that we could break the sound barrier, and we did.
People have made light slow down to walking pace using a Bose Einstein Condensate, and have sped light up, getting a photon to travel faster than the theoretical maximum.
We are so insignificant to any race who would have the intelligence to travel to this planet.
Also, this thing of them not communicating with us.. zooming around the sky is probably akin to saying "we're here". If we cannot communicate on their level why would they bother with us?
The theory for me is that any race who's come to Earth and seen us, has seen it all before, among many planets, and 1000's of years ago got over that whole "we've found an alien race" thing. We are just old, uncivilised news to them.