Surely this is just using valuable natural resources (electricity) for profit, causing unnecessary pollution as a consequence? A bit like being paid to leave your car going on high rev's 24/7? Maybe I missed something but this seems totally irresponsible.
This is exactly the reason why I would never go down the route of BitCoin mining.
However, look at it another way. By using electricity, you are paying a higher electricity bill and putting more money into the economy of the country you are living in. Which is a good thing.
Another point is that whoever gets involved in this enterprise, will use their own money. They are not stealing or breaking the law. If they want to spend their money on this, surely it is their right?
I am 100% against BitCoin mining as it is a practise which does not serve anybody (if you get a job, you are providing a service to someone) HOWEVER, I also understand that everybody has the right to to spend their money (on computer hardware and electricity) as and how they please.