Click fraud is increasing day by day. Or atleast the awareness of what click fraud is, or how prevalant it is, or the lack of transparency by the big search engines on what they are doing to prevent these click frauds. This recent article on BusinessWeek is elaborate and provides a lot of information in this area
http://www.businessweek.com/magazine/content/06_40/b4003001.htm
One reader’s comment is
“While click fraud is a problem, I believe the bigger problem for advertisers is the unreasonable time frame in which a repeat click from the same user charged to your account. For example, if someone clicks on your ad, then 2 minutes later again, then 5 minutes later again, then 1 minute later again–you get billed for 4 clicks. If you complain to Google, you get the canned “Comparison Shopping” e-mail. So while you may be getting clicked on by legitimate buyers, you may be paying several times in one session for the same visitor to come to your site, making it very hard to calculate costs of PPC advertising. I would like to see a timeframe that is at least reasonable for repeat clickers who are “comparison shopping.”"
Sometimes you go to Amazon you may not find what you want till you do a couple of searches. However, with each search, it shows “Your Recent History” which contains links to the previously conducted searches.
So, why can’t the same be done for the ads too? That is, once a user clicks an ad, then have a section to show the recently clicked ads? So that, if the user wants to just get back to the previously clicked ad, he would directly click on the link in the “Your Recent Ad History”?
It is important for companies like Google and Yahoo! to realize that their primary source of income is online advertising and make sure they take every possible measure to gain the confidence of the advertisers. Sending the canned “Comparison Shopping” email doesn’t cut it! Common, there are supposed to be really very smart guys, PhD from Stanford and what not, guys working in these companies. It would be a shame if these guys just send out such canned queries and not really think of creative and innovative solutions. Sure, they don’t want to disclose their algorithms on fraud detection, but atleast be sure to come up with solutions that are visible and change the perception.