Are these "pirates" even interfering with legitimate users?
If not, who cares? They probably use radio rather than streaming because a lot of old ladies like to listen to preachers who maybe can't get around too easily, and don't know what "streaming" is.
So long as the preachers aren't scamming them out of their savings, it seems pretty petty to go after them. I guess O'Reilly identified 'pirate radio' as a problem when he was 22 years old and resolved "someday I'll have a position of minor power where I can crack down on this terrible scourge!"