Disclosure of any of those, not to mention your passwords, name (when logging on to social media), can all be easily prevented with a privacy filter. What’s A Privacy Filter? These are like screen protectors placed on your laptop screen, except the 3M™ Privacy Filter limits the viewing angles. To make using a laptop privacy filter practical, 3M developed its 3M™ COMPLY™ Attachment System. A displayed password, code snippet, or other personal information caught at a glance by a shoulder surfer could cause you potential headaches a 3M ™ Privacy Filter can prevent.