Speed killing. I think speed is a very dangerous and addicting drug. You might not want to kill it off completely, some of the speed might be useful in a medical context. Oh you mean killing people or animals quickly? Never mind.
I sit and think of everything, then I wonder where I've been.
If there is a population control issue, then some kind of humane way of dealing with the problem would be what I would support...spaying or neutering possum or something. Shooting creatures for fun? No.