I'd be in favor of this punishment. Especially since I would definitely be the one doing it to the guy who raped me.

Since rape is less about sex than it is about power, I don't see how taking away sex drive would help someone overcome their need for power.

Are there any studies to show that rapist don't get enough sex, anyhow? I can't imagine that nearly every rapist is some sex-crazed maniac. Those types of people (the sex-crazed maniacs I mean) tend to act in different ways, I would imagine (they are probably more angry and violent physically, rather than in terms of rape).