Comment by immibis
16 hours ago
Their controls are buffed up: all of those accounts are linked due to having been created with the same IP address. If one is blocked, they all are. If you try to circumvent this with a well-known proxy (such as Tor or a V"P""N") you will find that captcha activation will not exist as an option.
That definitely doesn't look good for privacy POV. If they do not want abuse, they ought to use other means. They should not associate IPs with account creation. That is kind of scary. In fact, if what you have said is true, then one's account can be blocked by someone else's mischief on the same IP, which is not very uncommon at all i.e sharing the IP.
They could take government ID, or fingerprint your machine, make you submit a picture of your face, do these options seem better to you?
Nope. Zero-knowledge proofs seem to be the middle ground, IMO. Prove X without revealing X itself.
How else?