Do you really want ISPs to be in the business of deciding what should and should not be on the internet though? That sort of thing typically doesn't work too we

Do you really want ISPs to be in the business of deciding what should and should not be on the internet though? That sort of thing typically doesn't work too well. Deciding what is or isn't a "scam" is really a job for the independent judiciary. But getting a ruling is difficult and time-consuming, and also largely pointless because a new website can be created almost instantly, and there are many foreign ISPs where you can't get a ruling at all. I don't really disagree with your basic premise that "disconnecting the bad actors' ISPs from the Internet" is the ideal solution, but this is far more difficult than your comment implies – almost impossible with how the internet currently works.