I get really annoyed when I’m reading an article on a web site (thank you msnbc) and a contextually sensitive add pops up. I use my mouse cursor to keep my place when I am reading an article, so it the ads really get in my way.
You can block them in IE7 by going to Tools>Intenet Options>Security> click on Restricted Sites then Sites. Add the following two sites to Restricted Sites:
So you will never see one of these again!