I would have to say this is unconstitutional, but it plugs a hole in the legal system that is incapable of dealing with properly dealing with inherently dangerous people. Anyone who is willing to destroy someone else for their own pleasure is someone that has no "right" to mix with the public. The fact that the government has not been able to get sentencing to properly account for this is the real problem and this ruling is a stop-gap measure.

In many ways the old west justice of a lynch mob was far more effective at dealing with many types of crime. Once the lynch mob was done there was no risk of repeat offenders. The downside to lynch mobs is the false/positive verdict that cannot be retracted. A solution is needed, but this law and ruling only highlight how poorly the system is at keeping people safe. It clearly does open the USA to the risk of permanent detainment of people that are at "odds" with the government. I am sure that Obama would not mind "detaining" some BP executives for a while as risks to the greater good.