There is no such thing as abuse of decentralization, if in the first place bitcoin was made with decentralization. If there is anyone who abuses power here, I think it is the people who requires unannounced KYC in order to receive the bounties. Decentralization in cryptocurrency is just normal.
I would second that. There were instances when I was denied the rewards after my refusal to undergo last-minute KYC. Rather than using it to remove the scammers, nowadays KYC is widely used to cheat bounty hunters of their hard-earned rewards.