Aha! Anil reports that you *can* do the restrict-cookies(/javascript/anything else)-by-site thing in Internet Explorer (4+) after all. It's just non-obvious. Go to Internet Options / Security / Restricted Sites and click on the Sites button to add domains you don't trust so much. Anil says he also uses this to disable JavaScript on xoom.com and tripod.com sites (thus, no pop-ups). To do this, I think you also need to hit the Custom Level button and check Disable Active Scripting. Great tip! Thanks, Anil.