In this rule includes this:
Random meme images under posts meant for serious discussion
We’ve started to see an uptick in random memes in some posts meant to garner serious discussion or theorizing. We never formally announced this rule change in the past but we’re doing it now to make users aware. This behavior is against the rules and going forward you will be given a 1 day ban if you break this rule. If you see this behavior under one of your posts please report it and mods will clean it up and murder said user.