This is perfect. Eventually, anyone who disagrees with our government or the current party in power can be tagged as an "extremist" and be put on a surveillance list. The definition of "extremist" will change over time to involve any dissenters from all walks of life. What was it: two years ago? There was the memo that was leaked that had Ron Paul supporters, Veterans, those who invoke the founding fathers in political discussions, militias, etc. were listed as "threats."
The government loves all these state laws being contested and brought to the SCOTUS. It gives them the opportunity to set a legal precedent giving them more power. These rulings abusing the 14th amendment to expand federal scope and authority will come to a head someday and everyone will be blaming the other team for the current misfortune.