Well yeah if they tend to use it as illegal activity they should be stopped...

No wonder the police is taking measurements against such acts. What would you expect? Use electricity produced by companies for free?
Nevertheless they should go legal at least and use other alternatives. If they have so much money for buying so many rigs they should go solar panels instead.

I'm not a judger but that's what i would do if i would be consuming such amount of power for my own rigs.