I think it's been a massive **concern** since the first pool was launched but not really a problem. We have several projects monitoring censorship and of course things can move suddenly without us being prepared but if that meta pool started censoring orphaning blocks with OFAC sanctioned transactions, are you convinced that individual miners that learn about them having contributed to those censoring blocks would all just nod and go back to what they've been doing before like they do when they read your call to action?

Yes, miners did not get all hands on deck when indeed OFAC transactions were fitlered out in individual blocks in the past and that is a bad sign but you can argue that they do this at the cost of missing out on those fees. If they do re-org out those transactions it becomes a clear 51% attack that nobody can argue about anymore. It is a change in quality I would not assume to be treated the same. 

 What you are discussing is phase 4, we're currently in phase 2.

It's also worth noting that mining is intended to be centralized while bitcoin is not under attack, becoming increasingly decentralized (and less efficient) in proportion to how criminalized it becomes. 

https://youtu.be/X_xgmVLyB94?si=z5HDoK1laP_GmpQY