[Puke]

yeah, we've all spaced people. my favorite was to jetison captured colony ships or pop transports over blocaded planets. it didnt really do anything, but it sure felt satisfying.

I think you can do the pop-eating thing by building a facility that has population growth penalties, and in exchange gives some sort of bonus. I know this works for research levels and conditions, so i can only assume that pop growth can take a negative number. you'll have to test it.

the problem would be that it would work against your population too, or whoever was on the planet with the facility.