Here's a great hack for our Windows users. Go to the following Windows directory:
C:\WINDOWS\system32\drivers\etc\
Open the HOSTS file with notepad. Add any "ad spam" vendors to the list like this:
0.0.0.0 ad.doubleclick.net
How do you get this URL? Three simple options:
(1) If it's a graphic, right click on the graphic and scroll down to Properties. The "Address" will display the path where the graphic is being pulled from.
(2) If it's a graphic, you can also view the HTML source to see the path.
(3) If it's a popup, download and install PopUp Killer. It rocks because it displays the path for annoying popups, including the ones that "hide" the IP/URL of the offending server. PopUp Killer rocks because it is freeware, it uses little resources, and it works.
By doing this, the ad server that is trying to upload an ad graphic on your system (and eating your bandwidth in the process) cannot make a connection with your system. You will see a blank IE space where the ad should go.
BTW, I also do this whenever I get HTML email spam. What happens is that spam-email vendors will send an email with graphics embedded. When you open the page, the graphic will be uploaded from their server... and more importantly, it pings their server with the info that your email address is valid... resulting in more spam. I know this little trick because I used to be a product manager for an enterprise email application. Anyway, by doing this hack, you are effectively blocking their server from uploading unwanted garbage on your system AND the spammers will not know that your system "exists".
Anyway, best of luck in your anti-spam war! Please feel free to email me if you have additional questions.