Well, that would require government regulation, and all the crypto enthusiast think that it's the root of all evil and the government shouldn't be trying to protect them from scams. A lot of things in crypto should be illegal but aren't because regulators don't want to tire themselves with the hard work of enforcing bans. For example, creating a token with a promise that it will work and have some features, and later failing to deliver that due to lack of trying is essentially a scam, yet it has never been classified as such so scammers can completely legally do that.