At this point there are enough scams to make people cheer for the ban.
Perhaps a better answer would be regulation in a similar way to more traditional IPOs.
>> an securities sale that doesn't ask them for their ID, and thus doesn't meet securities regulations
Perhaps it's just not a good idea to have such a thing?
Or perhaps the seller side of the equation, where you can't run an ICO without being registered and regulated, is needed.
I know, this circumscribes some of the allure of the whole area - that it's free of regulation, that it democratises finance etc etc. But like other avenues in life, perhaps we are being shown why the regulations exists in meatspace in the first place.
BTW I'm not trying to argue that all regulations and government actions are correct and useful, I'm very sympathetic to the idea that we are over-governed and over-regulated, in lots of ways. But perhaps not here.