Nearly every computer or software company is guilty:

• Apple has .Mac pushed down our throats everywhere in OS X, starting with the signup process, in iSync, and so on.
• Microsoft pushes MSN services
• Adobe tried to hook up photographers to its stock photo service, and at one point even shilled for Kinki’s
• All PC manufacturers sell out their users to crapware publishers and turn the average PC’s home page into a garish collage reminiscent of the stickers on a racing car.

In the most recent installment, Apple’s iTunes 8 insists on putting links to the iTunes music store and its nasty lossy, DRM-infected music when you browse your own library. The only way to disable them is to disable the iTunes store in parental preferences (one rare instance where lawyers and corporate risk-averseness actually help consumers).

Linux is immune to this phenomenon. Perhaps at some point people will switch just for a respite from the constant marketing pressure.