Raids

A Raid is an event that occurs when a group of people enter a server and start spamming. (usually with insulating/offensive things) Only to cause chaos and harm others in the server. Raids are usually premeditated in some way.

What to do in case of a Raid:
Try to ban the raiders as quickly as possible. I'd personally recommend getting Anti-Spam Discord Bots to help with the issue. Make sure to also report the raiders to Discord's Trust and Safety Team to try and possibly get them banned from the Service. DO NOT RAID THEIR SERVERS BACK!! You would then be the one breaking Discord's ToS and you would be banned from the Service as well.