Your supporting their actions by taking the snake in though. I'm not bad mouthing your idea it is just that if you take it in ten more will come in his/her place. Utilitarianism is greatest good for the greatest number. If one has to die for the lives of 10 others so be it. It's a sad fact of life but there is nothing you can really do. If you want to help snakes try and find a reptile shelter near your house and see if you can adopt one