You have to admit, your post does sound a little, well, angry and extremist.
How about letting your users go there and see for themselves just how "extremist" it is?
Do... do we have some way of stopping them?
People don't get modded out of the community. They may be modded down, like here, but SN doesn't permaban people for expressing unpopular opinion like Slashdot does.
I think what he meant is that people get tired of being modded down all the time and leave.
What I can say is that a lot of the assertions you are making are bullshit, and you should leave it up to the few remaining non-corporate-sockpuppet users you have to decide for themselves.
Now you have to admit, this smells of extremism. The hostility. The defensiveness. The strong emotional statements that don't seem based in reality. OTOH, I'm almost certainly a corporate shill who can be ignored? Because Slashdot.