I think @terrana was complaining about Discord's super-annoying "when you join a server, Discord tells everyone to spam you with animated gifs" function.
One of the servers I am on found a way to fix this! (Admin-side action, alas, so doesn't help individuals joining new servers).
But for your own Discord, you can block the awful "welcome" spam by:
1) Designate a separate, unused channel as the entry point for new users.
2) Block everyone from posting on that channel.
@Satsuma @rowyn That mitigates it somewhat, but not nearly enough. You're still dependent on an admin to make those choices, someone who doesn't know you and has to balance it with how everyone else there might prefer it.
There isn't even a way to even tell how it will act when you join without actually doing so.