Does it make sense to hold persons who has committed any type of sex crime past their maximum prison sentence if upon release there is no agency to monitor them in the community?

Sex-Offender residency restriction are mostly about protecting Parole Officers oppose to promoting public safety.
Read the attached article and answer the following question.
Does it make sense to hold persons who has committed any type of sex crime past their maximum prison sentence if upon release there is no agency to monitor them in the community? Please be mindful that without a community supervision agency (parole) to monitor them they can go anywhere they want.

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