[tantek][social] it so not problematic as long as you don't leak any friends-only information. The permalinks to Swarm check-ins are login-gated so that's fine.
[tantek]If I’m the only one interested, feel free to mark postpone for a year or whatever to gather more data. Or if you're trying to clean up stale issues then we can link to the issue as a "want" to the Swarm page in terms of IndieWeb support and you can close the issue as insufficient user interest.
[social][tantek] Would the person favoriting have anything on their site showing what and whom they favorited? I know the person in Swarm would only see it and others they are connected to. If nothing is exposed one the person favoriting’s site that is fine.
[social]The public, private, semi-private bounds get tricky when it comes to breaking the boundaries. It is a problem that Google+ ran into and caused a lot of issues because groups were only semi-private, but you had no idea who was in or out of a group.
[tantek]Re "would the person favoriting have..." that's a larger question around what should or should you not display in a reply context on your site, especially if the the audience of the the thing you're replying to is different from the audience of your post
[tantek]Worse than Google+ was when Buzz used your Gmail sent/received emails to seed your Buzz following/followers and it really screwed things up for lots of folks
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