Sex offender registries are a joke. You've got violent serial rapists and pedophiles sharing the lists with guys who got busted soliciting prostitutes and 18 year-old high school seniors who got caught screwing their 16 year old sophmore girlfriends.
And then you have to wonder how many people were put there due to corrupt prosecutors and judges...
It is disgusting that any truly violent sex offender, rapist or pedophile is ever allowed to walk the streets in the first place. We would never consider this approach with any other violent criminal. Could you imagine a murderer's registry?