I see three reasons folks would want to shut down the forum
a) They dont want to read what others have to say about the AMA
b) They dont want anyone to be able to read what others say abou the AMA
c) Regardless of alignment, they are sick of the mud where discussion should be

Looking at A, the simplicity of that Closer to just stop coming here himself is obvious.
I dont like what Oxygen & Lifetime put on the TV, so I dont watch those channels. What I do not do is write letters/campaign/vote to have FCC shut down those channels.

But the more dire is B, folks dont like what is said & want to stop anyone else from being able to read it.
If they want to hang out in an AMA Biased Forum, there are plenty of those to chose from, most by the AMA& Districts. But in an unbiased forum, why try to introduce censurship, and if that fails, disband the unbiased forum as ultimate censureship.

And of course C, regardless of good or bad, things have gotten Ugly.
Repeat offenders. Frequently attacking posters rather than post topic. The inceasant use of where folks are from. Baiting for a lock when losing debates. Allusion to insult to stay within the rules. Warnings need to become Weekly Suspensions, and corrective actions need to be Monthly Suspensions. Three strikes you're out, perma-out. Some folks paid? Well, they didnt pay to be above the law, did they?