"Goodness me, I have opened up a can of worms!"
This is good, most people really aren't aware that things like getting "free" music, games or books is actually a bad thing to be doing that causes a lot of genuine hurt and distress to the creators.
Silly adverts on DVDs or in the cinema isn't going to stop this, talking about it will and everybody wins.
"Why have music libraries, isn't it just asking for trouble?"
Just because something can be used for illegal activities doesn't mean that the thing itself should be banned.
"unless you are making a multi million pound business out of it I do not think anyone is really interested."
It's not people making money that are the problem, it's just people doing it.
These days one person can buy a CD, copy it and pop it up on a file sharing site. A dozen people download an absolutely perfect copy of that file to their machines and then share it themselves to another dozen people, who again get a 100% perfect copy and then share it again. All that from one CD and non ones making any money from it, least of all the people who worked hard to make it. The "reach" of copies that start from a single source is potentially unlimited.
That ability to spread perfect copies exponentially on from one single source is why all of this is such a great problem. Back in the days of passing tapes around in school that just couldn't happen. Each copy of a tape got progressively poorer in quality, you could only physically pass it on to a few people and people had limited pocket money with which to buy tapes. The "reach" of copies that started from a single source was very limited.
"We buy one book and share it between 6 or 7 of us. Is that illegal?"
I believe so...
There's certainly still only one copy of that book that one person has at a time. Compare that again to electronic copies where many people can simultaneously "own" the thing and each of them in turn can pass it on to many other people.