To me, I feel so little additional accountability just because there's a backgrounded meeting. I scroll Twitter in large meetings already.
But if there's other people who would see a report that I was on Twitter/HN/Reddit for 10 mins of the flow session, I would not let myself do that.
> It’s harder to slack off / goof around when there is structure, community norms, and a clear leader.
People had this in an office, but I bet your monitor screen being visible to everyone around you in the office is more of a forcing function to not goof off than all of those other things combined.
The data broadcasted that I have in mind is something like what RescueTime might collect (https://twitter.com/jarredsumner/status/1426962249332125701/...). Obviously difficult to navigate privacy issues around a feature like that, but I don't think impossible (e.g. I'd trust a collector agent if it were open source).
Anyway, that's just me personally. Good luck!