There's a similar problem with draft events. I would say this problem is not about ephemeral events specifically.
Discussion
The main issue is I don't think I can block ephemeral events with strfry's write policies, but I could be wrong. I might need to update strfry.
Draft spam is at least handled by rate limiting?
I may need to finish proxy mode in noteguard:
https://github.com/damus-io/noteguard/issues/9
then I can do more advanced stuff like this... 🤔
Draft spam on every single character or keystroke seems a bit much.