The Grapevine allows your web of trust to calculate influence scores (that are NOT proportional to follower counts; see my article on that), the purpose of which is to help you decide who is worthy of your attention for any given context. It will allow you to set threshold default scores for users. If spam is not a problem, set the defaults so you can read or listen to what anyone and everyone has to say. If spam is a problem, dig into the control panel, find the slide bar, and adjust the defaults to screen your content as rigorously as necessary.

I have the protocol and an initial proof of concept for curation of lists. Just gotta build it out more, that's all.