People who download movies/music/games do not edit the content to make themselves appear as the creators and artists. Quite the opposite, warez releases usually come with a synopsis and background info on the distributed work.
Warez releases are often ripped, modified and repackaged in a way that may or may not look or act anything like the original.
Copyright holders have the right to decide when, where and how their work is displayed, consumed and presented, but the public at large don't seem to give a damn anymore.
In other words, you oppose the RIAA going after The Pirate Bay. But by your own argumentation going after, say, a college kid with a terrabyte of fileshared music on his computer is ok, because the material is hosted on his computer.
Could you please confirm that this is what you are saying, or admit that you're in fact engaging in sophistry to justify you stealing content (music), but at the same time defend yourself from others stealing your content (blog entries, technical articles).
I can see misapproriation as an ethical issue, but copying, not at all.