Because they're not garbage collectors.
First, invade ze kitchen...
None according to the Russians.
A MARSHian
Alien vs. Predator
A. because he wanted to help untie the human race.
Garbage collectors.
Because they (some of them) don't have a garbage collector.
So they could play football on Saturday, go hunting on Sunday, and pick up garbage the rest of the week.
So that there's no chance of a hung jury
Me: We're putting Harriet Tubman on something that enslaves us all today.