When someone casually states that he has an "80gb collection of pirated music," I assume he feels that the act of copying contrary to the wishes of the copyright holder is either a good thing or, at worst, ethically neutral.
For those of us who disagree with this idea, it is important call out instances that seem to minimize the significance of this. By remaining silent, we help encourage behavior we disagree with.
Opinions differ. Strategies for reforming copyright differ. But I think the issue is important enough that people who think it's OK to ignore copyrights en masse should be explicit about their beliefs. Is your opinion that:
1. Copyrights are bogus. I should be able to copy anything I get my hands on.
2. Copyrights are good if they benefit licenses such as the GPL. Copyrights are bad if they benefit big record companies.
3. Copyrights should apply to books. Copyrights should not apply to music or software.
My opinion is that there are many aspects of current copyright laws that I would like to see changed, but that generally current laws should be followed unless they rise to a level of evilness that calls for civil disobedience, a principled and public decision to disobey the law in an attempt to get the law changed. I also think that the benefit of the doubt should be given to the author of a creative work as to their wishes for the copying of the product of their work. Personal convenience or being a cheapskate are not, I believe, sufficient reasons to fail to pay for the copyrighted materials that you have obtained.