The funniest over the top animal lover story I heard, was on a homesteading type forum where a woman was having problems with racoons getting her chickens. To combat this, she put up mice traps "to pinch the racoon's fingers so that it would learn to stay away from her chickens". I don't know what that chick was thinking, but I serious doubt you can "teach" a raccoon not to get your chickens by spanking its fingers. To even think so was kind of funny.
As for animal disposal; Smitty and friends, you are not far off the mark. Maine just passed new laws regarding animal disposal, and since I am a USDA farm, I must abide by those new laws. As we speak, I am waiting for a soil engineer to come to the farm to approve of a animal disposal location. A coyote bait pile is now quasi-legal. As long as the pile is in the right spot and not next to certain places like water bodies, property lines, etc, and all traces of the animal are disposed of within two weeks, it is legal, but where I put mine is close to a swamp so it must be moved. It is kind of tough because I want that pile WELL AWAY from the sheep pastures! Equally, when I lost a lot of sheep a year ago, I took mine up to the big dairy farm where their disposal site is, and that too is now against the law since they don't want you transporting them off your farm.
Being a sheep farm, we naturally have some nasty rams, and the problem with rams is, they are worth $150 bucks. When they get nasty, they take out your back or your knees, which with the hospital bill, loss of time from work, etc far exceeds their own value. It is just not worth it to have nasty animals, especially when you consider the liability of them!
As for animal lovers, oh my last year I had a dog get into our chickens and ducks, and after the third time we had enough and I just shot him. People thought that was just cruel, some even saying, "they were just ducks and chickens", well I make money off the ducks and chickens, so it was more like, "he was just a dog", and here we don't have problem animals. We don't pass them off to other people to compound the issue, we take care of it here. The same thing when they get old. The problem with pets is, we out live them, and I am not going to pass the responsibility of their end of life needs onto someone else. It is not something I want to do, but just a reality of of our 80 year life span, and their 15 year life span, and while I can understand people not having the heart to put down their own dogs, in the end whether it comes from a bullet or a needle, dead is dead.