Solution to the Cat Problem

I think I know a quick and easy, but morally wrong solution to the cat problem. I'll trap as many feral cats as possible in my garage, close all the windows/doors and leave the car running until its over. Not that I'm suicidal, but if I were to kill myself, thats how I would want to go. Turn the heat on and get nice and cozy, turn on my favorite radio station and go nite-nite. If I did it this way, I wouldn't have to pay the $20 to take it to the Humane Society (those lazy bastards).