The point is they are assumeing that these people are guilty of vandalism, assault, arson
Freaking hippies, lock em all up!
Seriously, if the FBI didn't excerise a little caution and kept an eye on these people, and they did something nasty, there would be a line of people ready to blast them for doing nothing. They provide a little (legal) surveilance, and you complain. FBI just can't win with some people.
Doesn't bother me if they keep an eye on the protestors, and if they protestors are not up to or planning anything illegal and just are excercising their right to lawful demostration, they shouldn't be bothered by it either.
dago