These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Memetic Mutation: So, so much. Saxon = Joke Account is probably the longest running though.
The character battles are a big reason for the L block's popularity.
Recently, "X needs an ice cream monster" has become a bit of a catch phrase on the 3DS and WiiU boards, due to a rather infamous anti-Nintendo poster known for, among other things, his blind, seething hatred of Vanilish.
WoT (408), it originated as a forum to discuss the events of 9/11 and then the war on terror. One of the two acknowledged instances of board decay; it quickly devolved into a social board, and due to the topicality issues, the board was temporarily removed, then reinstated as a hidden board. In the process, it was officially renamed from "War on Terrorism" to WOT. The politics discussions were then given its own board, 261.
To a lesser extent, read the main article on this page and think of everything associated with the site: the message boards, the polls, the character battle contests, the controversial reviews, the fanbase arguments, the moderation, the CNET controversy... and realize how few of those words are actually about FAQs and guides nowadays.