Would Ghostery be successful at blocking this?
I highly recommend it. Be aware that it does block disqus by default, I usually whitelist that one.
However, I'm happy that most of the time it prevents the annoying features of a page from loading.
a) You want to allow some service (I allow disqus, for example): disable blocking for the service b) A site requires facebook/twitter to log in, or you trust the site: whitelist the site (allows all tracking scripts)
I do wish it had a "allow by domain" so I could allow e.g. just facebook on just turntable.fm so I can log in, but not allow all of ttfn's other trackers.
Works fine on abc.com ;) http://screencast.com/t/01D8EF6AH5ij