I understand what you mean,
but do you know...! about blocking crypto ads by social networks like Facebook and others that aim to protect users from fraud, and at that time I also saw many fake projects that raised funds and after that they disappeared.
Well the project is that there are many people in crypto sphere blindly invest on a project without doing their investigations and due diligence. That's why scammers are not stopping because there are people who are still falling for their trick
Yes, banning crypto ads can perhaps lessen, but it still up to the individual if they wanted to be the next victims of scam projects plowing around crypto market. You can protect yourself by learning and getting educated on how this market operates. No easy and free money here.