> Scientists have informal trust networks that I’d like to see made explicit. For example, I’d like to see a social media network for scientists where they can PRIVATELY specify trust levels in each other and in specific papers, and subscribe to each others’ trust networks, to get an aggregated private view of how their personal trusted community views specific labs and papers.

That sounds fascinating, but I'd have a darned high bar to participate to make sure I wasn't inadertently disclosing my very personal trust settings. Past experiences with intentional or unintentional data deanonymization (or just insufficient anonymization) makes me very wary of such claims.