The Moo's were a big problem in Illinois. They were eventually shut down with their "Leader" and some other high ranking personnel jailed
http://www.urbin.net/EWW/MA/cmd-tax.html. Now fast forward some many years later, the schools are popping back up again as Chung Moo Do as opposed to the original Chung Moo Quan. Instructors claim they have disassociated themselves with the original school.
When I first moved up to the Chicago suburbs back in 1984, I joined the school for a 30 day trial. When my 30 days were up they price jumped enormously from what I paid for the trial. Since we could not afford it I had to quit. I started receiving phone calls from them at 10pm at night saying that I was weak and anyone could just attack my family because I wouldn't be able to defend them. Keep in mind that I was 14 at the time and they would not talk to my mom directly, they kept asking for me. A lot of their membership was based on extortion. I am not sure what the new schools do or say now to get people in their doors.