We certainly don't want to spam people's newsfeeds though. I think it should only post like every 6 or 12 hours with maybe our five most recent changes. Something like:
[Name]'s anime activity in the last [number] hours has been:
Watched 1 episode of [anime]
Watched 3 episodes of [anime]
Finished watching [anime]
Stalled out on [anime]
Though I think this shouldn't include titles you mark Want to Watch and Won't Watch.
This is just a sort of preliminary idea and since I just woke up, it's probably a pretty shoddy idea but meh.