That's not really the issue though (and for the record, I agree that a person
found guilty of what they were arrested for 15 times should be incarcerated).
The problem is: why is this person doing this, because there are at least two outcomes:
1. we lock them up, and a part of the problem is gone
2. we lock them up, and someone else steps in to do the same thing
From my perspective, there's ample evidence to suggest that #2 is more likely, and thus even if locking them up has some moral weight behind it, it isn't likely to be a solution to crime in general.