The anonymous fics and art are from the Snarry_a_thon fest currently being hosted at
snape_potter. It is their policy to Flock all adult rated entries, hence the reason for the last item on this list, re: being able to see the entries.
If you click that link it'll take you to an explanation of what to do to join the community (the only way to see the entries, I'm afraid).
Good luck!