> The site I visited did not set the cookie, .mac set it.
Reality check... The site is a .homepage.mac site, and it sets the exact same cookies as are set by the avatars on FTM, although I'd have guessed that they'd be more "intrusive."
> Unless this is the nasty exception, there's also the YouTube cookies you get when visiting a thread with an embedded YouTube video.
Nope... The exception is extraneous to this thread (unless somebody posts hir interest).