I get the feeling a lot of people are referring to Agegate like Watergate, a scandal style scenario (what I thought it was). But I've found references to Age Gate requirements on forums as far back as 2009 (colonyofgamers) as well as Quora and Google Products pages from 2011 where people specifically asked how to set up an Age Gate. So apparently it is a real thing and apparently nothing new because the comments/rants/questions/opinions/etc. are exactly the same now that they were nearly a decade ago.
What I really don't understand is... when I'm logged out of YouTube, all these videos people keep saying have been blocked I can see. I can click on the videos and watch them. For instance, all of Naybors 22 videos, including the ones he specifically mentioned were blocked, I can see and watch. So I log in, all 22 videos still visible and watchable without an age restriction warning. It's this way with everyone's channels...