Morrus said:
Oh, I wouldn't say that, necessarily! Driving dangerously is wrong, driving fast is not neceessarily so.
It's certainly illegal, though.
And there's the rub.
The arguments can, by and large, be summarized thusly:
1a. Most (not all) publishers will tell you that "pirating" stuff is (morally) wrong.
1b. Most (not all) downloaders will tell you that "pirating" stuff is (morally) right, even if it's not legal... in the same way that speeding may be illegal, but that doesn't make it wrong.
2a. Most (not all) publishers will tell you that "pirating" causes lost revenue. Some will say each download is a lost sale. Some will say some downloads are lost sales. Some will say that only a very few downloads are lost sales.
2b. Most (not all) downloaders will tell you that "pirating" does not cause lost revenue. They will tell you that if it wasn't free, they wouldn't have purchased it. They will tell you that they want to "try before they buy" and then say, "well it wasn't that good" (in which case, the download has a higher probability of causing a "lost sale" since the downloader already admitted an interest and without the download might have been willing to buy).
3. There are no studies with relevant data, because doing such studies are incredibly tricky... and when they are done, they tend to be contradictory. Depending on whose study you believe, you will conclude that (a) MP3 swapping helps CD sales, (b) MP3 swapping has no effect on CD sales, or (c) MP3 swapping hurts CD sales.
4. There is often a semi-tangential discussion on the goods and evils of copyright as currently ensconced; downloaders frequently point to "unreasonable copyright" to defend their activity as (a) a form of civil disobedience or (b) justify their copying on moral grounds ("copyright is broken, therefore I am under no obligation to respect it") and (c) PDF products - especially DRMd ones (another tangent) - do not behave like regular RPG books with respect to Right of First Sale doctrine. Publishers often counter those arguments with (a) you aren't "sticking it to the man" but rather sticking it to a "mom-and-pop shop" and (b) point out that if copyright was significantly shorter, even 7 years, most of the "pirated material" would be under copyright anyway, but usually have no answer to (c).
5. As a tangent to copyright, "Fair Use" often comes up as well and how that is defined. If you own a PHB, is it "Fair Use" to have a scanned/OCR-d copy provided you don't share it with others? Is it okay to buy a PDF then send a copy to your whole gaming group? Etc. etc. etc. This tends to be muddier water to navigate, because not only is moral right and wrong ambiguous (as it is in the 4 above sets), ethical/legal right and wrong is ambiguous (because "Fair Use" is decided on a case-by-case basis).
6. Economically, people point out that (especially for PDF publishers), demand is greater at the "free" price point than any other price point - and that it's extremely hard for publishers to compete with "free" and turn a profit. In some cases, the product is identical (PDFs being shared), in some cases better/worse (see comment about region-free DVD rips or consider a low-resolution image-scan with no OCR of an RPG book).
There, in a nutshell, are pretty much all the arguments that either side floats. Where I stand on these issues is pretty-well documented, no need to re-hash them; anyone who cares can search for them.
--The Sigil