The examples I gave—downvoting based on opinion not content, downvoting based on ideology, upvoting your ingroup, upvoting because they’re you friends—are all things that can be done while staying anonymous.
Your initial complaint was mass-downvoting, which is explicitly called out in the FAQ (based on your own quote!) as something the admins are willing to de-anonymize for, no?
You think I haven’t done that?
If you had done it, I would expect your initial comment to contain something along the lines of: “I reached out privately to the admins, through standard channels, to complain about mass-downvoting. Despite the forum guidelines, they didn’t do anything. Their stated reason was X.”
I think vote power has helped maintain a culture of expertise here on the forum. It’s hard to find quality discussion on the internet.
However, I think concerns about groupthink are valid. We could try having a section of the forum with no voting as a “control group”, for instance. Or tweak the algorithm to penalize feedback loops.