To be fair the relays run in the US have publically identifiable IP addresses and can be traced.

Worst case the big relays may have requests to remove certain event IDs.

Overall the diversification of multiple relays may mean that even if the big relays do remove the events that the posts will still be viewable.

Even if by some additional coercion they were able to “ask” clients to block these events, using another client will be easy to do.

I think it will be futile to stop “wrong think” and if any laws are broken, the authorities will have to (gasp) do their jobs, instead of lazily sending emails to service providers to do their jobs for them.