I don't like to kill living creatures. I won't kill roaches but I will watch with amusement when the cat does. I once had a neighbor who was always calling the cops on me for playing my drums. I went around my house and caught all of the roaches. I put them in a jar and released them on her front porch.
Revenge is a meal best served cold.
I'm not a very vengeful person but call the cops on my music and you'll inherit my roaches. Not the good kind either.