Yup. We’ve been hearing about these since 9/11.
Only reason I can imagine they’re still existing is they sufficiently resemble any other armed self-defense training grounds, and given assorted 1st & 2nd Amendment protections there’s not much feds can do about them.
During the “DC sniper” incident, I know of one [upstanding] self-defense school that was approached with demands for its student roster. Head instructor told ‘em to pound sand.
Unless actual ties to criminal/treasonous activity can be established, nothing can be done. Just because some link is imputed (without proof) doesn’t mean it can be shut down.
>Unless actual ties to criminal/treasonous activity can be established
Declare islam illegal and move in.
But there's plenty the militia can do about them! Starting with surveillance, planning, and positioning and having Muslim visitors to these places "disappear"...