Humans would do all of those things. Maybe aliens would, too, because they respond to the same incentives and threats, but perhaps a prerequisite for cosmic fecundity is a more mature outlook.

I mean, a human could spend their entire life locating and exterminating ant colonies, and ants would fear that about us if they could conceive it, but we generally have better things to do with our time. (Of course if we're in the way...)