Which ever the cause I think this is a policy that is harmful to deep and meaningful discussion. There's no doubt that this sort of "public muting" will have the affect of reinforcing group think. Does it seem healthy to do this to opposing views? Shouldn't we all desire to have our beliefs challenged by alternate viewpoints once in a while?
I see grey text in every thread, about every subject, for what appears to be any reason at all. Every day I see polite, reasoned opinions, about things that are far from "settled matters", even about such things as esoteric as Javascript code architecture, muted for saying something against the grain.
This is not a positive thing.
I ask that you please cease this absurd practice. If a post's content is inappropriate or detracts from a discussion, please remove it, but please stop this group think enforcing policy.