...I'd brand sex-offenders right on the forehead. And the backs of both hands. And on the naughty bits. That way, everyone would know who they were, and there wouldn't be any need for a Manhunt; they'd stick out like sore thumbs.
Additionally, I'd keep them in fucking jail, where they belong, preying upon each other, or better yet, seriously weigh the benefits of grinding them up for use as fertilizer. If there's one thing in life that's certain, it's that psychiatrists and therapists are usually wrong (their 'science' is subjective, and doesn't often deal with realistic themes) and notoriously easy to fool, so their recommendations as to whether someone is'cured' of their penchant for rape, molesting little children are often far too unreliable.
After all, the majority of people who take up psychiatry and it's related fields are often really just trying to find out what's wrong with themselves.
As for the Penal System, when it returns to a model in which people are severely punished for their crimes, rather than 'rehabilitated' (which almost never works) society will be that much safer. The touchy-feely approach to sexual offenders doesn't work, we know this, but somehow they're still allowed to run around free.