I do like this [insert social service] with all of its fancy new features like [insert sharing feature] and [insert friend-organizing feature], but really have to pick a bone with [internet advertising-supported profit-making venture] over it's really crappy [insert privacy setting feature or lack thereof].
There is an extension called Plus Minus that lets you put a check mark next to only the circles you want to see in your stream. You can pick multiple circles to show. Just put the ones you want to ignore in a 'ButtHead' circle and don't put a check in that box and it won't show up.
so, about this [insert new social service], what do you think about [new social service feature] and how it compares to [insert current dominant social service]? This reminds me of [insert cool feature of long-extinct social service].