The blog post mentions race conditions, setting author_id to 0 for
   deleted messages (???), and a public discord server that deleted
   millions of messages which would be reloaded every time the channel
   loads.

   I guess they don't set channel_id to 0 either. Strange access control
   function.

   I may as well say it, certain law enforcement interfaces for social
   media sites use pre-designed features for shadowbanning. Snowden's
   documents are shit.

   Sent with [1]ProtonMail Secure Email.

References

   1. https://protonmail.com/