PPC Adword Yahoo Network Click Fraud
It appears most webmasters do not trust PPC. One of UK webmaster forums senior member Maxseo from Australia criticise the response he received from Goggle when he got and usually large number of clicks to his adwords adverts, ever since he stopped using Adwords.
The largest groups of search engine and web directory network on the planet ISEDN uses the fact that there is not such thing as click fraud on their network as one of their USP. All this discussion makes me wonder how wide spread click fraud is.
You can discuss this and other webmaster related issues at UK Webmaster Forums .

