securitas writes "The New York Times' Saul Hansell reports on pop-up advertising and the consumer backlash against intrusive advertising. It's worth noting that pop-ups and pop-unders are the most effective, lucrative and annoying online advertising form. The article discusses the boom in ad-blocker software, with AOL, Yahoo and Google getting into the game. Microsoft says that it will include pop-up blocking in IE when it releases WinXP SP2. According to one pop-under ad agency, 20%-25% percent of Web users have pop-up blocking enabled, double the rate of a year ago - Earthlink's numbers bear that out, with 1 million of its 5 million customers using its ad-blocking software 18 months after release. DoubleClick says that it is 'developing technology that will enable pop-up ads to evade the blocking software.' Why isn't that surprising?"