People who commit crimes should be fined or arrested. These are preventive house arrests for crimes that they might commit in the future. You really don't see the problem with this?
They also banned alcohol sales at night in some places for the same simple reason: the police has better things to do right now than dealing with drunk people or anarchists
They are known violent protestors. I don't care much about the freedom of "environmentalists" that protest against capitalism by burning down stores. Especially while the country is in state of emergency.