It is not my opinion, it is a fact that Authors (books' writers) and Composers are losing a big share of their legitimate profits due to file sharing. In everything there should be 'moderate usage'. Too bad that the law can't state the urge for moderation in clear terms, i.e. a law that states: /be wise in using your freedom/ will be completely uneffective. The Musicians could do concerts and earn something at the end, but how could a Writer earn his/her money? Probably by a second job, therefore denying us - the Readers - of other masterpieces. If file sharing were used in excess would there be new stuff to share ?

As was stated by Andrew, objectively, file sharing has some negative effects on the financial state of those who produce digital resources. However, "file sharing" alone is not bad, because "file sharing" doesn't just refer to the sharing of copyrighted, digital sources, but also personal files, photos, videos, etc. In this case, you should be clear which type of "file sharing" you want to talk about. "Illegal file sharing" or "illegal downloading" are more so what you are referring to. I think some people, even those who generally don't commit illegal acts, participate in illegal file sharing to some degree and maybe it doesn't have a "huge" effect on the original publisher, but perhaps there should be limits set on how we are allowed to share certain information.