Things like this ruin a forum.
With such a thread, you're picking art not by what it is, but by who made it (members of a forum).
That throws quality out the window. Pick by quality, not social factors.
You also create a monster no one can regulate.
What do you do if someone posts something horrible?
You can be an asshole and say, "Wow, that's fucking autistic."
You can politely nod and ignore. This tacitly endorses it.
Or you can lie and say, "That's really.... in-ter-es-ting."
Better just to avoid it. Kill the thread. They sure are popular though.