Odaily Star Daily News: Bitcoin mining pool F2Pool admits to filtering transactions from Bitcoin addresses marked by the Office of Foreign Assets Control (OFAC). After Bitcoin developer @0xB10C discovered this, F2Pool co-founder Chun Wang acknowledged that his mining pool did use this filter, but after being questioned by the community, he stated that he would abandon the review until the community reached a more comprehensive consensus on this issue. The relevant posts have been deleted after investigation.

However, in another post, Chun Wang pointed out that an "anti-censorship system" must be designed to resist censorship from a protocol design perspective, rather than relying on each participant to decide not to censor. He explained that Bitcoin should learn from the experience of the Internet in this regard. (Bitcoin.com)

On November 22nd, Bitcoin developer @0xB10C stated in a post that, according to his Bitcoin mining pool transaction review monitoring service miningpool-observer, F2Pool may have intentionally filtered four transactions involving addresses sanctioned by the Office of Foreign Assets Control (OFAC) in the past few weeks.