One man I knew who was an actual street corner activist was harassed so badly in the end he was even arrested and held without due process for several days. He was not guilty of the erroneous crimes that were pinned on him and thanks to a good lawyer and strong support he was freed and got a settlement from the FBI for $70,000. This is public information. What's not public is how they treated him behind closed doors. He was mind controlled to put it simply.
That's when the not so .gov stalking came in and he was pushed to the edge of insanity.