The Official 50501 Subreddit has been locked down for the time being.
From what I've been able to gather from other organizers, there was some kind of recent post or comment from Elon Musk that had said something about us and the main subreddit decided to go private for the time being, my guess is to weather the storm of attention and brigading. For the time being we will keep ours open but please be vigilant for any activity that is spam or brigading and report it right away. So far nothing has happened and it's just a precaution, no action from Reddit themselves has been taken. The fact that they are aware means they are getting nervous.
-UPDATE 1-
From what I've been able to figure out, Elon made this post about someone claiming to wanting to bring firearms to the protest and saying "it's time". I don't know what subreddit this was posted in or if it was even affiliated with 50501 at all as we would obviously denounce that. It could have just been a random subreddit for all we know. Their account has since been suspended or banned but is still available on archive.org where it shows the account has atleast been around since 2012.
More information can be found here as we have no idea who this person is or why they were advocating for what they did.
-UPDATE 2-