There are many more schools like this operating with non immigrants working as Flight instructors which is not allowed on M1 visa. Flight school allows them as they have to pay less to them and the flight instructor do this risky work to build flying hours.
As now Govt. stopped J1 visa which allows legal hour building, more schools doing same act as AAA.
If you name some school of use doing this do name it here so the new students can be beware of them while selecting flying school.