Is there scripts that prevent click abuse? I want to put Google AdSense on some of my websites but I am afraid that there might be people who would abuse and constantly click the ads or something like that. So I want to take precautions (well, on the other end I wonder if I am worrying too much )
Sounds like a good idea, but I've never heard of such scripts. But if you're a normal adsense publisher you shouldn't really be worrying about click abuse. You should only worry if there's something that you're involved with that could encourage people to click-bomb your website. Google are normally quite good at handling cases of people who suffer from click abuse, so you shouldn't worry too much. Anyway good luck with your search.
i think click abuse isn't true. so you need no scripts to prevents it. what you need is to follow googles TOS.
a few years ago there was a great script called AdLogger but just about exactly 2 years ago Adsense made some changes and effectively rendered Adlogger useless. Since then there has been talk/rumors of Google coming up with some sort of click-abuse protection, but nothing so far.