Each miner includes their own address and a nonce value in the work they are doing. Most of the work that goes into mining is generating failed hashes and is discarded by the client. Assuming a lack of mathematical attacks on sha 256, there isn't really anything nefarious to do with the published blocks.
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Each miner includes their own address and a nonce value in the work they are doing. Most of the work that goes into mining is generating failed hashes and is discarded by the client. Assuming a lack of mathematical attacks on sha 256, there isn't really anything nefarious to do with the published blocks.