Ethereum creator Vitalik Buterin is aware of many of the bad actors that have utilized the Ethereum technology to do bad things.
I believe he is suggesting that there may be a need centralized auditing services to evaluate these projects. But in a decentralized space, pushing centralization has never been a popular opinion.
Crypto by its nature will always have bad actors, you take the good and the bad with this awesome “wild west” style tech. Stay on your guard and do heavy research before joining any project!