Another form of illegal dumping is quite heartbreaking but it happens all the time. I volunteer at the local animal shelter and animals get dumped outside it all the time, or are brought in by people who rescued them from the roadside.
Often they were literally thrown out the window of a moving car. I mean, how disgusting do you have to be to deal with an animal like that? Especially when the shelter will take the animal in if you are willing to surrender it. Just be an adult and take it in so that it can find someone willing to give it the home it deserves.