Originally Posted By: Nioca
some weapons, [...] a Mac computer, some bacteria, and a supersoaker.
So why the bacteria, supersoaker and other weapons?
(Ha ha ha.)
...
Anyway, an alien invasion is not just unlikely, it is unlikely. Even presuming aliens exist, and presuming they have the capacity for interstellar FTL travel, they have nothing to gain from Earth that they could not have cheaper from elsewhere.
I'm going with the "space is big, energy is cheap, metal is expensive" idea. Traveling far for new living space is no big deal; building up and destroying space fleets is wasted resources.
The only way that interstellar war can make any sense is if we assume the participants to be guided by religion and irrationality. However, in order to develop advanced technology, the aliens have to be rational.