Forum ranking? Errors? What makes you think the existing system is wrong, or that one bit of it is "right"? Let's not waste time on something of interest to a tiny fraction of the Forum population, but if you must, see if you can get a dispensation from the mods and make an official proposal. Which we can then shoot down.
Move the Proposals section down to the extreme bottom of the entire Forum. Already mentioned, but this alone might help. As it is now it is an invitation to every "Joined Today" yahoo to jump in with their great idea.
I like the idea of having a "have you read the stickied thread" pop up appear when starting to make a proposal.
Maybe limit when a proposal can be made, i.e. None on day one of joining, none first week, etc. Or request a "pre-proposal" be made in Forge Hall before a formal proposal can be made. Something. I personally don't like the idea of having a mod having to approve each proposal before presentation; not necessary, and could create issues itself.
Yes, the one-line and other responses to proposals can get salty at times but are in reality very very mild in comparison with the truly insulting comments I've observed elsewhere. A post above describes this as spam and characterizes it as somehow mistreating the proposer. I disagree. The spam is coming from entitled, selfish narcissists who cannot be bothered to read the stickies or abide by Forum guidelines before making their proposals. Over and over again. They deserve what they get. But hopefully we can come up with some ideas to reduce the frequency of these and mitigate the impression some may form that the Forum is toxic. Because most of it truly is not. <sorry, stepping off soapbox>
I too would like a Night Mode, and a change in color/contrast (this scheme reminds me of what I saw last time I changed a diaper)