Antivirus developer Sophos is warning customers to be extra vigilant about reading licensing agreements before agreeing to having software installed on their system. In question are the tactics used by Avenue Media, a Curacao-based company sending email and Instant Messenger invitations to view free "funny" video clips of everything from Bill Gates getting a pie in the face to cows caught in compromising positions. Users who click through to take advantage of the invitation may receive a lot more than they bargained for...read more.