Just part of defeated proposal 34 (Proposal 34: cheating relayers patch), containing only relayer unregistration (and in smarter way to avoid unnecessary double iterating).
Proposal code: https://git.tornado.ws/ButterflyEffect/proposal-37/src/branch/main/contracts/Proposal.sol
Proposal tests: https://git.tornado.ws/ButterflyEffect/proposal-37/src/branch/main/test
Proposal contract: https://etherscan.io/address/0xec00d7ffe016837e551a2523f42031f1413810ed#code
Cheating relayers list
0x853281B7676DFB66B87e2f26c9cB9D10Ce883F37, // available-reliable-relayer.eth,
0x0000208a6cC0299dA631C08fE8c2EDe435Ea83B8, // 0xtornadocash.eth,
0xaaaaD0b504B4CD22348C4Db1071736646Aa314C6, // tornrelayers.eth
0x36DD7b862746fdD3eDd3577c8411f1B76FDC2Af5, // tornado-crypto-bot-exchange.eth
0x5007565e69E5c23C278c2e976beff38eF4D27B3d, // official-tornado.eth
0xa42303EE9B2eC1DB7E2a86Ed6C24AF7E49E9e8B9, // relayer-tornado.eth
0x18F516dD6D5F46b2875Fd822B994081274be2a8b, // torn69.eth
0x2ffAc4D796261ba8964d859867592B952b9FC158, // safe-tornado.eth
0x12D92FeD171F16B3a05ACB1542B40648E7CEd384, // torn-relayers.eth
0x996ad81FD83eD7A87FD3D03694115dff19db0B3b, // secure-tornado.eth
0x7853E027F37830790685622cdd8685fF0c8255A2, // tornado-secure.eth
0xf0D9b969925116074eF43e7887Bcf035Ff1e7B19, // lowfee-relayer.eth
0xEFa22d23de9f293B11e0c4aC865d7b440647587a, // tornado-relayer.eth
0x14812AE927e2BA5aA0c0f3C0eA016b3039574242, // pls-im-poor.eth
0x87BeDf6AD81A2907633Ab68D02c44f0415bc68C1 // tornrelayer.eth
All these relayers after unregistration could not replenish balance with 500 torn and continue cheating - they should be to register new relayer and spend 2000 torn.
Also, proposal contains compensation to deployer - 30 torn for deployment gas and execution after voting.