discreet, alias, curious labs, and adobe all have blacklists I believe. I read an article somewhere that Adobe now actually hires people to search these networks for their products using keywords and download the pirated versions, where they then blacklist the serial numbers, record the usernames of their sources, and then redistribute their pirated software with edited code that sends information back to Adobe about whoever is running it. They then notice who is downloading their edited software and run a search on that user to see what else HE is sharing. The people downloading their software aften have large amounts of other pirated software that they are sharing. This changes that person from someone who is pirating software to someone who is distributing pirated software, giving Adobe a much larger legal weapon. They gave an example of Adobe downloading a copy of Photoshop 7 from kazaa 2 weeks before it was officially released, editing the code to send a guid back to adobe when it was installed, and then redistributed it through kazaa. They had something like 30 downloads in 2 days. They ran a search for files from the same user on the person downloading from them, and found files for several other adobe products as well as plugins and other warez (they didnt specify what the user had, but we can guess). They said legal action was being taken, I'm not sure what happened. The point is, using these programs to acquire software is definately pirating, and sharing makes you an accomplice. If you are pirating using peer to peer networks, you never know when you'll get caught.