Report them to the Secret Service as a cyber threat to Americans.
Ask the Carbondale, Illinois Police Department (Weisburd) to investigate his online crimes (hacking, unauthorized network intrusion, emailing viruses, etc).
Investigations into this need to be done. According to the Tallinn Manual its a matter of whether or not your country chooses to respond. In the US, motive, means, and opportunity to commit crimes and very close to accompanying confessions are already in the mix.
The CIA, FBI, Homeland Security, NSA, and every other acronym will thank you for taking the time to do this. Since 9/11 these freelancers have been ruining real investigations, flooding the pipe with bad intelligence, false information, false accusations, and entrapment scenarios that still take massive amounts of time to invalidate.
Understand your Footprint
Using simple online tools like geosocial footprint will give you a basic understanding about your safety. In this case, it samples Twitter-generated data. While only a small beginning, it will give you an idea where to start.Call in the Cowboys
Contact OSINT websites and ethical hackers. Most of the people in these sectors are solid professionals. For websites if there are problems you may want to get a PEN test done and find your network vulnerabilities. OSINT professionals and web sites can give great advice.
It is the responsibility of the government to protect the people. Barring this, the First Amendment is only one of a few that are designed to protect the civilian population.
Criminal and civil investigations must happen. Class action lawsuits based on them against the groups, PACs, and politicians that support this must be considered.
Considering how easy it is to stop this, will we?