So this is an old thing I just remembered, but there was this guy who went by 'undercoverfilmer00v'. He falls into this category because his claim to fame, at first, was doing reviews of games that made him angry.
After that, he tried to become popular via doing epic GoldenEye 64 playthroughs in 00 Agent with extremely epic values, or so he claimed. Up until then, fine, he was just some dork that was popular for trying to be the next AVGN ripoff in 2007.
Except he got a crush on some girl. And in itself, it wouldn't be so bad, except that he actually went crazy for her, making lots of videos for a while about how much the two of them were destined to be together because he got baseballs for her and what-not. And while I'm not too sure, apparently he actually went full-in on his stalking to the point where he may have stolen her phone full of baby pictures just because.
Simply put, he imploded whatever internet career he had and got himself banned from watching baseball games of the A's over his obsession, deleted his videos, and is currently probably humping a body pillow in the basement of his parents' basement.