Yeah they can do all the “requiring” they want.
Nothing is going to stop decentralized and “virtual” companies from raising funding through assets not regulated by the US government.
Nothing changes. There will always be unrestricted ICOs
Several ICOs have tried to limit themselves to US customers. How did that work? They can try and cover their asses but if they want but to do anything on Ethereum, you can’t restrict transactions very well.
KYC/AML is coming to ICOs.
New contracts for token sales might put different sets of KYC type systems into operation but to be honest, doing this defeats the entire purpose of an ICO.