I went through and read about 40 pages of the 190 there are, with a focus on the two dates listed in the letter from the attorney.
I do not find anything so extreme that it should constitute an illegal act; simply "the public" voicing its dealings with a sham company.
I think our lawyer friend thinks that because he is a lawyer, you have to believe him "or there will be consequences." He is not the law, nor is he a judge; it is idle threats.
He wants to get offended because someone said "we'll take you down too." And because people made comments that we should file complaints to his bar.
If he has nothing to be afraid of, then he should not worry about people making complaints, because his bar would dismiss any complaints that do not have merit.
Since I am not involved in the matter, I cannot allege his involvement in any wrongdoing. But it would seem that if he is representing a company that is being investigated for fraud or other wrongdoings, then he would be a party to it.
I believe in our 1st amendment rights; and I do not believe his threats should keep people from voicing their free speech. I am even tempted to write a letter to his office, personally voicing my dismay.