Should criminals be kept with criminals of their own sort?

You might think this is like prison, but I have different ideas. I just read in the news paper that this ‘ex’-serial rapist, who did serve some time in prison, is currently living just 100 meters from a girls school. I think he should be living in some kind of comune with other rapists FOREVER. The same with murderers and active pedophiles. I think it makes perfect sence and it would be perfect justice. What do you think?