"An excellent idea! But I don't want thieves and murderers living near me either. Can we ban them as well? Please?"
My thoughts exactly. Yeah I don't want any sexual predator living close to me neither, but if you start banning them, people will eventually want other types of criminals banned. It can really snowball and only makes it harder for these ex.-crooks to get back to a crime-free life.
Flame away.
If they locked these evil people up as long as they deserve, this would not be an issue.