It was almost 5 years ago that we first reported that Yahoo uses web beacons to track their users’ movements across the Internet. So Yahoo’s use of web beacons is nothing new. But recently people who subscribe to Yahoo groups have started receiving Yahoo “Updates in Your Groups” email (sent from groupsupdates@yahoogroups.com), which has this little notice at the bottom: “To learn more about Yahoo!’s use of personal information, including the use of web beacons in HTML-based email, please read our Privacy Policy.”

A class action lawsuit has been filed against Facebook, alleging that Facebook is charging advertisers for more clicks than their ads actually receive, and also that Facebook is not doing enough to curtail click fraud which is resulting, the lawsuit says, from competitors clicking on an advertiser’s Facebook advertisment in order to use up their allotted clicks and run up the advertiser’s Facebook advertising bill.