Found this at another website:
Everybody seems to have an angle...:rolleyes2Steam gets tricky
» posted on 09-15-2003 @ 2:22 AM by [ siN ]
For those of you metalheads who are also online gamers, it has come to the attention of the gaming community that Steam by VALVe software, the program that is used for the mod Counterstrike, has been (and still is) gathering huge amounts of information off of personal computers that have Steam installed.
"1) Browse to steam dir
2) Search for gcache.gcf
3) Open the 400+ meg file in a hex editor
4) Search for 'kazaa' and 'mp3'
6) Curse and uninstall steam"
The question is why is Steam looking at Kazaa user names, mp3 contents, HTM records, and more? Those suspect of these activities are pointing fingers that these actions might somehow be linked to the RIAA and it's attempt to browse through users files and folders in a vain attempt to see what people are downloading. Just a heads up.