Not only is the content downloaded from services like that illegal, it's often loaded with viruses and other kinds of spyware, which is apart from the spyware bundled with the download program.
There are a few legal download services, such as Apple's iTunes and Napster, but Kazaa, Morpheus, Limewire, Bearshare, etc... The programs themselves are legal, the network is legal, the majority of the content on the network is NOT legal.
i am trying to find a good download program for music, like morphius or limewire. anyone have one they prefer? and my last computer slowed down enormously when i downloaded it, so is it a good decision to download one at all?