Anti-Invisibility Potions is a very simple plugin that disable invisibility potions from being used by normal players.
When a player tries to drink or throw an invisibility potion it just replace it with an empty bottle instead and send them a message which can be configured in the config.

This plugin will not work with bukkit versions older then 1.4!

Commands & Permissions

You would only get the following commands and permission by default by being OP.
To get all the permissions without you can use antiinvisibility.*

CommandInformationPermission
/antiinvisibility    	  Display some info	  -
/antiinvisibility on	  Turn the plugin on	  antiinvisibility.on
/antiinvisibility off	  Turn the plugin off	  antiinvisibility.off
/antiinvisibility toggle  Toggle plugin status	  antiinvisibility.toggle
/antiinvisibility reload  Reload the config	  antiinvisibility.reload
-			  Bypass all checks	  antiinvisibility.bypass

How to install

Download the most recent file and drag and drop it into your plugins folder, then simply just restart or reload the server.
You can change the message that are given to players when they try to use a invisibility potion in the config as well.

To-Do

If you got an idea let me know.. Currently I don't have any.