Raiding

Raiding - when a user/users spam in the chat, pinging people, sending bypassed decals or bypassing the chat filter. 
People raid servers mostly as groups, raiding servers where they somehow gained trust and administrative permissions.
=== Example: ===
(And no I’m not teaching how to raid.)
A raider who gained administrative permissions and trust will make a bot which will spam @everyone in every channel.
Then he demotes everyone (if there is other mods/admins) and bans everyone.
Then the owner will ban the raider and load the save of the guild, which may result in some data loss of the guild if there is no autosave.
The raider makes an alt and does it again.
To prevent this from happening in your guild, report the people who raided and wait until they get banned, since, you cant join on an alt when you are banned on an other account.
=== Notes : ===