The best post I've read in ages!
99% of the people who say, "I have free electricity" are in dorm rooms or apartments. And they have no idea just how much electricity it takes to earn significant BTC income. AND they have no idea just how much heat and noise mining will generate.
A standard dorm room's electricity will be capable of earning about $4.00 per day. An apartment, maybe 3 times that... before the landlord comes-a-knockin' and starts asking if you have a grow-farm in your apartment.
Heh or until they plug in that new miner and all the power goes out on the floor as someone tripped the 20A breaker.
It's the old 15A wiring that is going to really go pop. I've seen some homes and apartments that use the crappiest 14guage wire and you can even see it charred at the socket terminals. Stick a couple S3s on that socket and you'll be asking for trouble with anything else on the line.