Very nice work!

Though I do worry that having to burn sats for every event will be too big of a UX hurdle to gain widespread adoption.

That's why I've been working on a spam deterrent where users have to time lock sats instead of actually having to spend them. A legit user incurs near-zero costs, whereas attackers must immobilize capital proportional to the number and lifetime of identities they maintain. If you, or anyone reading this, is interested, check out my latest post. I'd love feedback from the community!

Still, proof-of-burn is very interesting and might be needed as the ultimate deterrent at some point. Thanks for writing the paper!