Don't you hate these people joining your server, spamming their server's ip?

This plugin will bring an end to this.
It searches the chat messages (and specified commands) for server addresses like 111.111.111.111:12345 or server.domain.com. The plugin will then check if this message really points to a minecraft server (by pinging it) and in this case can:

drop the message
censor the message (replace the advertisement by ***)
kick the player
broadcast a message
notify moderators of the advertising
execute a custom command

Source: Github

Frequently asked questions

Commands

/antiadreload: Reloads the plugin configuration.
Permission: antiad.reload
/serverping: Pings a server manually.
Permission: antiad.ping

Permissions

antiad.notify: Permission to receive notifications about server advertisement.
antiad.reload: Permissions to reload the configuration of the plugin.
antiad.ignore: Permission to send chat messages without being checked.
antiad.ping: Permissions to ping potential servers manually.

config.yml

Click the heading ;-)

Development builds

Development builds of this project can be acquired at the provided continuous integration server. These builds have not been approved by the BukkitDev staff. Use them at your own risk.
CI-Server

If you want to support the development of this plugin, you can donate by clicking the button on the top right corner.
Thanks to Absolutionmc for donating.

AntiAdvertising