Rodents
Some people hate rodents, I don't. Like any form of life, finding a balance is the name of the game. They are vital to ecosystem health, they play a role. Sometimes they get out of balance because of natural forces, sometimes we create environments that they are attracted to and thus it's our responsibility to moderate our behavior in order to prevent infestation. We'll never win a war against them, we have to find ways to live in harmony.