We’ve seen plenty of household hacks. Some of them work… and some of them are pretty hack themselves. However, this new video is something very useful. With just an exacto knife and some 3d glasses, you can convert your monitor so nobody can see what is on it unless they are wearing a set of polarizing lenses. This is great for people with snoopy roommates or even people who just like to wear 3d glassed for no reason.

That is awesome, but try it with an older monitor first because I’m pretty sure that voids the warranty.