What should we do about sex offenders?

Well i think that sex offenders should be kept locked up. Usually when someone does something to hurt someone else.. on perpous. They will most likely do it again, so why take the chance and let them out to do it again. I understand that some people may be wrongly accused of something like this, but life sucks and thats how things happen. But I don't know, I just think they should stay locked up and not let out. Either that or.. possibly the death penalty. That's what I think.