[karkinadze]

most people don't know this, but every microsoft product embeds your mac address in to the file. that copy of office xp you downloaded off pirate bay? yeah, every document you create has your mac address in it. the save file from whatever microsoft game you downloaded? yep, it's i there as well. i imagine other publishers do this as well, i can only vouch for the microsoft knowledge. they know you "stole" it.