This is slightly irrelevant, but if you are looking for a plugin to work with ratios/ratio freedays and use !w (warden) for about $10-$20 we could sell you our custom-plugin which will auto-disable warden and display a message in chat what the ratio is and it is over the required amount. (3:1) in your case.
If you cannot find something, feel free to add me on steam
http://steamcommunity.com/id/balon21 - im sure we can create one easily.