But, what would prevent the owners of Sinbad from opening the clone service and advertising on the forum again?
Note that the steps of Sinbad's owners are under the surveillance of the authorities.
This could cause serious problems for the forum, and for the users of the forum. Some, without knowing it, could see their lives ruined the day they decided to visit a country and at the airport they are arrested, because of a simple signature on the forum.
...
Or, sometimes, a decision is wrong on every level, and no amount of 540 degree mental gymnastics can justify censorship and pandering that go against the fundamental philosophy of why crypto emerged in the first place.
In your and apparently @theymos's line of "preemptive" thinking, the forum should be shut down today because you can't predict which criminals will show up here tomorrow or what service / entity USA might decide to sanction next, so better to go home and drink a tall glass of milk...
On the other hand, intellectuals around the world understand that governments and states have their own amoral and often sinister agendas,
that many rules and regulations are ridiculous and downright harmful, both on an ethical and pragmatic level, and that smart individuals can congregate to formulate a better alternative for themselves, and for humanity; a notion I would have thought wouldn't be so alien in a forum made for crypto enthusiasts...