To be fair, links at the top of the site header aren't exactly hidden.
I've seen comments where people haven't noticed for years that the site has a footer with links as well. The mods added thread folding and people just never even bothered to try clicking the new link to see what it did, so they never realized that was possible and kept asking for the feature. All of this "hidden" functionality is literally just a link or two away, but it might as well be buried under desert sand as far as this community is concerned.
