Yahoo! Pool Rulers

In my Yahoo! Pool life (since year 2000) i saw so many things, been many leagues, meat many persons and saw many cheating forms. This kind of cheating called "Rulers" also known as "paper" users. These are the losers whom put a ruler or a piece of paper on the computer screen with hoping to pot their balls. While aiming is important and they don't have an idea about it they fails at mostly shots but may pot some easy ones.

This mostly done by newbies who think they are clever but they soon realize that it don't work well.

How to prevent ?

Setup their ruler takes some time so this cheaters need time, if you play timer games ( 10 sec is enough ) you don't have to worry about them cause they can't have the time they need :).