I want to use adsense to promote some of my online business, but since fraud click are rampant are there ways adsense detect this or control it?
You don't use AdSense to promote your business... you use AdWords. And you can prevent the occurrence of fraud click, if you are so worried about it, by not checking the "content network" option in the Edit Campaign Settings area of your AdWords account. .
or your site stinks or your stuff/service is too expensive or your ads are misleading or too general. Lack of conversions has nothing (or atleast very very little) to do with fraud and that answer just confuses me The previous suggestion about content ads is a good one if you are that paranoid as I show a signifigantly higher conversion in search than content across all my ads. Otherwise, try and see. I haven't experienced huge amounts of fraud but I would guess it depends on your area. It doesn't make a whole lot of sense to risk losing your adsense account for .03 clicks if you know what i mean.
Dont get into hysteria. G would close down adsense if the problem were that real. I think they take care of click spammers well enough.
As YFS stated, make sure your adwords are relevant and accurate. I see so many people advertise something that I am interested in etc... I click through and it was basically garbage about something else. If someone is ready, willing and able to buy and your ad is well written, you should see a high conversion rate.
Very good points, yfs1. According to my experience, if you turn off content newwork, you will lose a significant amount of traffic and potential sales.
This depends on your industry and its something only experimentation will tell you. If the original poster is that paranoid then they will be losing a lot of traffic and potential sales in general. That is up to them if they want to lose $ to save a few fraudalent clicks (even that is a maybe)
Google seems to have a very strong policy and they pretty much the largest bank of data of user and user patterns. Pretty sure they have the statistics to sort things like this out