Common sense would dictate that illegal file sharing/downloading would be considered theft and not intellectual property rights piracy. People are not stealing the source code and trying to sell the content as their own, they are downloading copies of stuff to watch and likely delete when done with it.
Not even the state you worship considers copying theft.
http://en.wikipedia.org/wiki/Dowling_v._United_States_(1985)
The phonorecords in question were not "stolen, converted or taken by fraud" for purposes of [section] 2314. The section's language clearly contemplates a physical identity between the items unlawfully obtained and those eventually transported, and hence some prior physical taking of the subject goods. Since the statutorily defined property rights of a copyright holder have a character distinct from the possessory interest of the owner of simple "goods, wares, [or] merchandise," interference with copyright does not easily equate with theft, conversion, or fraud. The infringer of a copyright does not assume physical control over the copyright nor wholly deprive its owner of its use. Infringement implicates a more complex set of property interests than does run-of-the-mill theft, conversion, or fraud.