Would you be willing to confirm your phone number with Warpcast via SMS (wouldn't be publicly visible):

1. Gave you an algo boost
2. You could see other users verified by Warpcast

If it was the only option, and there was no ZK wrapper etc, then I would likely refuse out of principle.

Is there an open source reference implementation of a zk wrapper?

Hm, why do you always ignore our sealc.red as it doesn't exist? 🤔 We've basically not only built the same things, but also have more badges minted and built it earlier