k, Ill go grab the shotgun after work and have a little kitty blood bath since it is the better thing to do then give them a chance at life. April you gonna come? it is the better thing to do so you should be down like charlie brown
A shotgun is not an acceptable or even legal method of euthanization. I assume you are going for shock value here but that's really not cool. There is a big difference between humane euthanization and what you are describing.
The fact is, a stray or feral cat on the street has an expected lifespan of 2 years. Those 2 years will be likely miserable and disease/flea/abuse ridden. During those 2 years a cat can have several litters, all likely to have the same fate. Abandoning an animal like your roommate did is also illegal, many states consider that animal cruelty. That is why there are shelters and pounds. Sadly a lot of these are kill shelters but that is preferable to abandonment.
Your thinking of -give them a fighthing chance to make it on their own- only perpetuates and exponentially increases the problem.