F2Pool, a mining pool representing about 11% of hash power on the Bitcoin network, has been found to be censoring transactions involving entities listed on the US Department of the Treasury's Office of Foreign Asset Control (OFAC) sanctioned list. While this does not currently have a significant impact, if more mining pools adopt this policy, delays in transactions could become longer and more frequent. The real concern arises if a majority of mining pools not only censor transactions but also refuse to build on top of blocks that include these transactions, as this would make Bitcoin no longer censorship-resistant. The author expresses a hope that the Trump administration will address these state attacks on Bitcoin.



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