Agreed - but I was talking about one of a million gamers who already has the hardware or will buy future hardware regardless of their Bitcoin potential. So no, your hardware is not necessarily cheaper.
Agreed, but if Bitcoins are widely successful he will probably be able to buy something he was going to buy with USD anyway so that's tax avoidance at most - which is perfectly legal. But since taxation of Bitcoins is still somewhat in the gray area we can only speculate anyway.
No, you didn't understand my point: if difficulty is so high that you are earning money while the private miner is losing on electricity cost - you as a company with a large scale mining farm would probably gain more by taking the offer from some other company who has demand for HPC simulations (finance, automobile industry,...) and is willing to pay good money for it.
My point is, that your margin over the private miner is limited by the next most lucrative offer for your computing power - the private miner probably doesn't have alternative offers which makes him worse off in terms of total profit but he might be the one making more Bitcoins.
No, I never argued that a private miner will mine at a loss - how did you draw that conclusion?
Again - nobody needs to mine at a loss for my arguments to hold.
Some have their computer running 24/7 anyway and don't mind the noise then there are the watercooling enthusiasts and whatnot. I'm just saying that there are a _lot_ of private people worldwide who already have the hardware and can mine Bitcoins at a profit for as long as you as a business would rationally mine Bitcoin professionally.
You probably won't get much for your Bitcoin-ASICs if everyone switches to SHA-3 or Bitcoin gets abandoned...
No idiots needed for the scenario I depicted - don't know why you think private miners are not able to do a simple cost-volume-profit analysis for their mining activity. There are plenty of grown-ups that have gaming equipment and not every youngster is necessarily incapable of rational thought. Also no need to remind me of the electricity rates in Germany - I happen to have first-hand experience
This is like web hosting. Yes, some people host from home. Most dont.
I think mid term we will see large scale mining.
Professional large scale mining will always be a part of the Bitcoin network but I doubt that they will drive private miners out of the market anytime soon. Just make some back-of-the-envelope calculations of a potential business wanting to outhash all the current mining pools combined. As a businessman you surely know that your real expenses to set up such an enterprise are much more than total_hashrate * cost_of_gpu / hashrate-per-gpu. Go ask Vladimir how come he dares to charge more than that. The higher your costs, the higher your risk - no matter how cheap your credit lines are.