said by Mr Matt:Chances are extremely remote. Too bad for those where some human made a mistake somewhere along the line. That's life - not always fair.
Not if you never illegally downloaded copyrighted material and you receive a letter because the ISP was sloppy linking the date when you were assigned the IP address, that was previously assigned to another subscriber's account. So they send you a warning letter even though another subscriber previous assigned the IP address did the dirty deed.