but in a large building / campus, they can't possibly monitor electricity usage per individual or company occupying the space without upgrading the infrastructure significantly.
And things like a class of students sitting in a lecture theater with their laptops plugged in, are they mining or gaming or maybe just some hung process is in an infinite loop taking the CPU to 100%?
(I'll admit that I've used a "heater.exe" for warming my hands with a laptop on a cold day...)