Ok, many people saying that that generally copying music is like stealing it.
I would not say that so generally.
For me you have to see the ppl who copy music and sell it for their own profit -
that is another intention and this is not sharing! That is more harsh than the second.
The second is sharing - sharing is free and the intention - that is why I do it! - is
to enjoy thoughts, files & music together with other. Enjoying it together is better than enjoying it alone. The other thing is that it offer you a huge database of interesting files - not only music which could be quite useful.