Human ass cheek resonance is unique, like fingerprints. There was no database at the time though.

Careful if you have any Reddit alts. This particular moderator has the ban evasion filter set to the highest sensitivity on all of his subreddits (it’s a Reddit feature that flags suspected alts of banned users based on account details and device fingerprinting) and will report every case of suspected ban evasion to the admins. They normally don’t care but will look into it if a mod reports it. If you accidentally post on any of his subreddits with an alt the admins will permanently ban all of your accounts.