Asbo Zaprudder wrote:
If it's that easy, where are the aliens?
All over the place? Human history on Earth covers a small part of spacetime. The part of it when we were aware of the possibility of aliens is even smaller. It's so tiny that any contact in that time could have been easily missed.
We've discounted all alien stories because we think aliens are not racing all over the galaxy with warp drives. If they are, however, we might need to revisit some formerly crazy stories.
The theoretical possibility of FTL drive has never been a major factor is discounting crazy stories of alien encounters. The total lack of physical evidence and unreliability (or "craziness") of supposed witnesses is what invalidates most of it.