I'm against it.
For one, it hasn't been proven to even work.
For two, I think that the only people who should have a say as to what goes into someone's body should be the individual and their doctor, not a judge or politician.
Third, they've already served their time in jail as required by law. Going beyond that seems counter to our justice system.
Fourth, it seems overly barbaric and I don't think that's the way our society needs to be headed.
We already put them on sex offender lists for their entire lives and restrict where they live and work. I think counseling would be more productive, and more civil, than chemical castration.