Users are already planning protest art. I personally wouldn't encourage people to join because it's more traffic for Reddit, but that's just me.
On other news, apparently requesting a subreddit now requires a 28d old account with 100+ karma.
EDIT: it's on again, since 20min ago:
The only two recognisable things are the "fuck spez" and nationalists spamming some government flag.
EDIT 2: better view:
I think that the meaning of the sentence in German up there should be rather obvious. It's on-topic.
I'm torn about r/place revival. I'm excited to see how people embarrass reddit management, but it feels like management is allowing it cause they know it will drive up daily active users they can brag about before the stock goes public.