they will keep posting.
Ignore them. Let them post their lies and trash. Let them snicker about how no one has any adequate responses to their "facts" and "reason."
Who knows, they may never go away, which is likely if they are indeed spooks and this is what they're paid to do. Regardless, there is not much else we can do but save our energy for positive action and mirror their ignorance with ignore-ance in return.
Comment around their posts if you want to comment on something. Let their posts stand as what they are--big gaping puddles of illogic and violence--and step around them as you keep the real thread of information and discussion going, without a word of acknowledgment to their crap. Let them fling their shit at the wall and then let them expend their energy on squealing and jumping up and down and watching it slide down to the floor, not you.