These are the sort of people for which silenced .22s are made. Things that go pop in the night...
These are the same people that kidnapped
and branded an investigative reporter in England who infiltrated one of their cells and exposed their tatics. They are dangerous individuals who are as rabidly convinced of the righteousness of their anit-hunting and anti-human ideology as the 9/11 terrorists were of their anti-American views.
And there is only one way to fight them - thankfully hunters have been known to carry firearms...