Liquidity aggregator 0x said most Uniswap v4 hooks it analyzed were designed to quote one price and settle another, with some malicious routes delivering users as much as 50% less than displayed. Its analysis of 84,163 hooks across six chains classified 19.4% as safe, 54.2% as malicious and 26.4% as likely malicious as of Sept. 11. One Base ETH/NVDAc hook collected $143,037 in fees, charging fees of 0% to 18% and a median 18% when charged. The findings renewed debate over whether hook developers, aggregators or interfaces should bear responsibility for screening permissionless liquidity. 0x said it removes problematic sources even when doing so makes displayed quotes appear less competitive, while Uniswap and Paradigm said aggregators should route through vetted hooks. The issue highlights how a favorable quoted output can diverge from settlement when liquidity sources tailor their behavior to routing or simulation environments.