RE: On the other hand.
"Self-righteous BS about how piracy doesn't "cost" anything."
Piracy is a form of robbery. Robbery is forcefully stealing something from someone. Stealing is taking property belonging to someone else with the intention of permanently depriving them of it. Therefore file sharing isn't piracy -it's copyright infringement which is a civil offence not a criminal one. More importantly it's a civil offence that's technically very hard to prove someone has actually committed as has been made clear in previous comments.
"The obvious thing to point out is that games cost money to develop and the business model for developing those games relies on the system of copyright"
The business model relies on the fact that a certain number of people have enough disposable income to buy the games that are produced. As long as the games are good and are well marketed then they sell well enough to make a profit.
Obviously the business model does not rely on people with very little disposable income. This tends to be the type of person who heavily file shares. If file sharing disappeared tomorrow it's not like this part of society would suddenly start buying games by the barrow load instead of sharing them: they couldn't afford to.
"As for the solidity of the case, I can't comment, but I suspect that if your machine really has never had Kazaa etc. running on it then you're not going to have a problem, are you?"
Of course you are going to have a problem. Never having "Kazaa etc." on your machine doesn't mean a thing. That's why comments above cover the inherent insecurity of wireless networks as well as multiple machines sharing the same IP address. I won't even go into the legal implications of a company snooping on someone's online activity, never mind using the end result of that snooping as evidence in a court. Even if it is a civil case.
"I don't think you've got anything to complain about when you get your ass sued by copyright holders."
I'm old enough to remember when it would have been unthinkable for the average person in the street to be sued or indeed for them to sue someone else. Now even if someone's stupid enough to slip on something in the super market they sue them. In short, suing has just become a clever way for lawyers to make more money despite the fact no criminal law has been broken. That's a pretty sick way to make a living in my opinion.