The question is about voting in decentralized systems. Quadratic voting is a wonderful way to reach consensus without arranging property qualifications. However, quadratic voting requires a KYC: otherwise, the attacker will simply distribute his funds to many accounts and get many votes, bypassing the quadratic increase in their value (and get linear one).
Question: can a quadratic vote be modified to be used in decentralized systems where all users are anonymous? Are there any other approaches for voting in such systems except the simplest - linear?