The company I work for owns a site which has a niche community of buyers and sellers. There is a particular guy on there who has a reputation of scaming other u

The company I work for owns a site which has a niche community of buyers and sellers. There is a particular guy on there who has a reputation of scaming other users. When the users complain and post negative feedback about him, he threatens our company and follows through with DDoS attacks until the negative feedback/comments about him are removed.