The worst offenders are people who sell you movies and music. They're closely seconded by people who sell you software, or provide services over the Internet. There's supposed to be a trade-off to this -- you're getting a discount in exchange for signing onto an abusive agreement. But just try and find the software -- discounted or full-price -- that doesn't come with one of these 'agreements.'
And of course he has an especially kind word for the Vista EULA!