I am not sure I have ever had any 'unwanted' roosters, I like to raise my birds from chicks, so by the time I know they are roosters, I am already sort of emotionally attached to them.
I am grateful that we have a hobby farm now so I can keep my roosters there.
Yes, roosters are more violent than hens, but if you have kept a rooster flock for long enough, you will also know that some roosters can be great pets. They too, display empathy and caring characters.