>>that seems like a liberterian cop-out, and it doesn't take into account that it takes time and energy to do due diligence, most people are naive and can't do due diligence, and there's a huge incentive for ICO founders to lie, which creates an asymmetry of information.

People learn surprisingly quickly. A consumer base has a sort of collective wisdom that evolves as it gains experiences. Years ago, people would trust fly by night Bitcoin wallets that store the bitcoin client-side, and numerous scams and hacks cost people hundreds of thousands of bitcoin as a result.

Now everyone stays away, even new users, because only highly secure and reputable wallets that store cryptocurrency client side, or credible exchanges with cold-storage, are recommended on all major information portals, and everyone (including any likely first contact point for a new cryptocurrency user) strongly warns users to avoid storing their cryptocurrency on untrusted websites.