that anyone would say "...........not once have i deprived anybody of revenue! Most of the music i have downloaded i already have on CD (which i purchased) but cant be bothered to sort through the 500 plus disc's which i own to play an individual track."
Trying to justify an illegal activity in that way just isn't on, and there's more:-
"Downloading should not be illegal. What is the problem"
The problem (for what seems the millionth time)is that people have worked hard to write, perform, record, mix, package,reproduce, distribute and retail the music, and they all have a living (and in some cases a perfectly legitimate profit) to make. The people who own the copyright have a legal right to a fee each time someone copies or distributes it. By downloading and not paying, you are depriving those people of a part of their livelyhood - it's theft, in just the same way as taking a loaf of bread from a shop is theft.
We can debate the finer points of the music industry's marketing policy shortcomings until the cows come home, and I'll probably agree with you on many issues, but don't come here and tell me that you are doing nothing wrong when you download music for nothing, because you are. The fact that you may already have the CD in question and are just too lazy to find it makes things worse.