While I don't kill garter snakes, corn snakes, black snakes, king snakes, or indigos, I do kill water moccasins, copperheads, coral snakes, rattle snakes, and pygmy rattlers. Yes, boa constrictors, and pythons grow to be very large and are dangerous in the wild. They have overwhelmed the everglades, and other lowlands killing both native animals, and bird populations to dangerous lows. We don't have enough cold for them to go into full hibernation, or for the cold to reduce their population, so they continuously reproduce. They are problematic in the cities, and on farms too, however, less so in the cities, and on farms than in the everglades, and wetlands.