You raised a valid point and this guy is involved in a cyber crime and doing business;
Besides that, he threatened various users which is a crime.
Steemit platform is open to all and anyone can join here without paying any charges.
This user also holds multiple accounts. He also has some helping hands who are also equally involved in the same crime.

I already informed earlier about this matter in the booming group and you. I kept my eyes on them. No crime can be hidden for much time. They should feel ashamed about what they are doing.