I think the FBI has been issuing a lot of warnings to the US citizen about any scams, not just related to crypto. But this criminals knows how to target their victims, it's the old and retiree because they are not that adept to this kind of scams and so they are easy pray for this scammers. There were even a movie with this plot, someone scams a old lady, she died, then his friend takes revenge and killed the owner of the scam platform.
However, I'm still confused about the US justice system as they usually meted out sentences are that light, just like in the case of SBF wherein he would go to jail for just 20 years. And for sure he could have ask the board to review his case after a couple of years and could be out in 5 years.