News flash... you don't really have free electricity... you just think you do. If you are renting an apartment or office with electricity included in your lease, or you live in a dorm room or your Mom's basement... someone is paying that monthly bill. And that someone is going to notice a large-scale mining operation when that bill rolls in.
And you probably have a very limited amount of that "free electricity". Certainly not enough to have a mining operation that brings in more than measly pocket change. An average size American home can run about 10THs of mining equipment. Mine barely does just that and it's touch and go if the A/C and pool pump are running at the same time. And the income it brings in these days is negligible. So in your average office/apartment, you'd be lucky to run 2THs before you blew circuit breakers... much less if you're in a dorm room.
So please stop saying you have "free electricity" unless you have a wind turbine, a hydro dam, solar farm, nuclear reactor or a perpetual motion machine in you backyard. And if you do, you'd make much more money selling your excess electricity back to the utility company.
Shwew, now I feel better!
I read where China provides free electric to business there so who is to say if there is not other Countries or Cities doing the same? But for the most part you are right.