Personally, I hope (and I think I'm not alone here) that on a network like scuttlebutt, there will be much less "noise" than on facebook. My timeline on facebook (whenever I check it, like weekly) is a mishmash of...

* ads (if using a browser that doesn't get rid of them)

* "you missed someone's birthday who you didn't even remember you were "friends" with

* look at this really popular post in your social vicinity, ENGAGE!!!

* cat/dog/food pictures

* politics of the same kind I had to ignore as a teenager, back then by mail. Sign $petition here!

* the occasional thing I give a flying fk about

This is not accidental. It is what facebook is built to do: keep you on their page, engaged. Scuttlebutt and such don't have that incentive. Liking "Pizza" or "Justing Bieber" doesn't exist. You can like a specific post, but that's not the same as putting your entire preferences on there. The possibility to digitally model your entire family and social graph and all your preferences in the open doesn't exist, simply because... why would someone implement that? And why would they then gear the UI to reward you for doing that? And it's not as inherently in danger of becoming an across-sites profile kept by a single entity.