Items hidden were done by moderators: items posted in the wrong place, not 3 votes for T&T
SPAM, etc.
I noticed, and recall, sometimes folks (especially new posters) started putting their own favorites in T&T, vs. the policy of 3 member votes. Those are what I've most often seen hidden in the T&T sections. I've left everything as is (not unhidden anything) to stay true to the policy of the site/keep the integrity of the T&T's, and because I don't want to undo/2nd guess anything an official moderator did. Plus, don't want things to go wonky or lose my super powers! (Because though I have them I'm not an official moderator.)
(I was tempted to un-hide some though. Super powers are tempting!)