Here's an example from today's news of what a cop (and I) considered to be a true threat of violence but which the defendant maintains (so far) that he was trying to prove a point about workplace safety.

http://nixle.us/AMTQ6?fbclid=IwAR1pRErR6-CuOjvULJWJDSSKLISJ_...

So far this person hasn't committed any violent acts and I'm willing to stipulate that his stated grievance is founded in fact, though it may or may not have been his actual motivation. Have his free speech rights been infringed?