Computing.Net, from February 2004: "Both AOL's internet software and the AOL Instant Messenger program (AIM) are force installing unwanted software called Viewpoint Media Player on people's computers." I've just been subjected to my first Viewpoint pop-up, an invitation to update a program I never knew I had and never used. Computing.Net's story describes Viewpoint as spyware. Apparently, uninstalling Viewpoint could make AOL Instant Messenger stop working properly. This is the first thing that's ever made me want to investigate AOL IM alternatives such as Yahoo! Messenger. Interestingly, the PC where Viewpoint's pop-up appeared was running Windows ME. I've had no such pop-ups yet on PCs running Windows XP or Windows 2000.
UPDATE: Viewpoint may fall short of deserving the spyware label, but it's still software that doesn't play very nice. Details here.