Yes, and they will continue!
Catholics have a similar style of court called an Ecclesiastical court
The Jewish people have Rabbinical courts.
Even Mormons have a similar system for people sealed in their temples. It is called a Temple Sealing Cancellation. It is done through the hierarchy of the Church.
If you want Sharia Courts in the United States to STOP, islam MUST be ruled as a dangerous cult and outlawed first!