just tried out. I am waitting someone to build something like this to play with the relay-selector from flycat.club. I think I talked about this idea with nostr.band author before. just glad somebody has the similar thoughts and make it happend! one question, there is moderator on the relay setting, but there is no dashboard to really modrate anything comes to the relay, is this feature not roll out yet? and it seems to me when I set default message setting to deny, it will just abort any message sent to it? 
https://nostr.build/av/8c4fe1a632e9292b2020f1155fcef914401de5de85aebdacd278350e49cf231c.mp4
creating a relay in <60 seconds! 🔥 you can try it if you want, it's in demo mode on nostr1.com (only 21 sats)
you wouldn't believe how long I've been working on this.. lmao, it's rediculous.
Discussion
oh cool, glad you tried it. The moderator setting just allows that other person to nostr login, and they can manage the relay that you've created (they get the same config screen you see here). Right now it's read-only cause I have to fix the perms. The only moderation options are what you see there, you can block keywords or pubkeys, or you can run in 'deny' mode and allow only certain keywords or pubkeys. I want to improve on this and add more options, but this was the basics.
I want to integrate this with nostr lists, so that you can use them to bulk-add to the different filters, and I'd also like to have delete available as well, so that anyone in the owner or moderator crew can submit a report via their nostr client and an agent will be listening and perform the moderation action on the relay by deleting the messages retroactive.
awesome, deleting is a must. I think pre-approve and deleting if some message are reporting inapproiate is a nature pattern in moderating.