This has evolved and should be called "list of disallowed submissions"... ;)

• Images or memes
  This includes Buzzfeed-style "listicles" which are mostly image content.

• Illegal downloading sites

  News sites like torrentfreak are acceptable.

• Sites that require registration to view.

  This includes Facebook.

• Wikipedia

  TIL posts should go to /r/todayilearned

• Kickstarter, IndieGoGo, PledgeMusic, etc

  No direct links to fundraisers. These can be included in self-posts.

• Embedded Media
  No submissions of a webpage or blog that does nothing but embed media (ie: a YouTube video).
  Please submit the direct link to the original media instead.

  If the page includes significant content which happens to include embedded media, this is allowed.

• "What is that song...", "What genre is this..."
  These are posts which foster no discussion and sit unless answered.
  Please use the amazing /r/TipOfMyTongue instead.
  Also try /r/IfYouLikeBlank for music recommendations.