I don't like FEP-044f...

I think the idea itself is good, but the problem is that it adopts an opt-in approach. First, it cannot be quoted in software that hasn't implemented it. Second, static file-based servers cannot support quoting (044f requires sending a QuoteAuthorization when approving a quote). I've never actually seen a static file-based ActivityPub server, so you probably don't need to worry too much about that...

Also, since the canQuote policy seems to only serve as advice, it appears we can't make it approval-free... :(

(Please let me know if there are any errors in this; it would be helpful.)