AlertBot is a multiserver enabled, global ban/kick/warn list bot meant to help with the control and detection of raiders, dm spammers, underage members trying to get into NSFW servers, and a whole host of other categories.
Since not all categories apply to all servers, you can choose which categories to enable and disable alerts/actions for.
Because not everyone trusts a global ban list being accurate at all times, there is both kill mode and warn mode. Kill mode autobans any new member that tries to join your server, who is on the global list, under any category you have marked as enabled. Warn mode does the same, but instead of banning, it will send a DM to the server owner alerting them about the new member.