Yes, we do, maybe you'd notice if you didn't shut down your brain whenever you encountered a non-PC idea.
I don't think there's been much elaboration on the ideas that were already floating around here five-ish years ago in the last few years. We've just had the few regulars jumping in with the same message, failing to start much interesting conversation, and growing increasingly cranky.
Making being a reactionary your life's work isn't very rewarding. It's a feature of the present system that proponents who get boring and repetitive get thrown in the wood chipper and more clever and interesting ones take their place, but any single person will get stuck in their old material after a while.
I've gotten sufficient evidence from support that voiceofra has been doing retributive downvoting. I've banned them without prior notice because I'm not giving them more chances to downvote.
I'm thinking of something like not letting anyone give more than 5 downvotes/week for content which is more than a month old. The numbers and the time period are tentative-- this isn't my ideal rule. This is probably technically possible. However, my impression is that highly specific rules like that are an invitation to gaming the rules.
I would rather just make spiteful down-voting impossible (or maybe make it expensive) rather than trying to find out who's doing it. Admittedly, putting up barriers to downvoting for past comments doesn't solve the problem of people who down-vote everything, but at least people who downvote current material are easier to notice.
Any thoughts about technical solutions to excessive down-voting of past material?