The only concern I thought of, you already got: We really, really have to make sure that the commenting interface enforces identity restriction. If you have a locked post that tyggerjai can comment on, we DO NOT let tyggerdev comment on it, even though they're the same “person”. That's the ultimate UX nono, as far as I can see.
I'm excited about the prospect of all this happening!
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I'm excited about the prospect of all this happening!