Nothing like this or Worldcoin ever will be useful in any capacity for qualifying non-fraudsters, because fraudsters will have an infinite supply from people they tricked while non-fraudsters will only have what they've personally been given. So it'll basically do the opposite of what you want.
Worldcoin IDs are one per person and I've not heard of people tricked to give them away. Some have been bought for cash but there's a limit to how many of those will be available. In practice they are no good for verifying humans on blogs and the like though because only about 0.0003% of humans have one. But maybe something a bit like that that's easier to get?
