> Just add a new event kind 3xxxx which means "I am a relay" with tags declaring relay address under different transport (wss, onion, etc).

Is there a serious case against this? Because that's exactly what the noob in me would do. Leaving the option open to also specify the media servers that Community uses.

> Relays largely already have everything they need to do moderation

Yup, they might miss just a few things to make Communities work, but that doesn't mean we need copy (and add unnecessary complexity) to the whole relay spec in something like NIP-29, just to add these.