I can’t sleep on planes. So I’m one of those annoying people who always pulls out a laptop to get some work done. My problem (other than fighting for elbow space on the arm rests) is that the lack of privacy on my laptop screen makes me uncomfortable. I try my best to convince myself that no one's watching and that no one cares about the possibly embargoed information on my screen. But I also know that I often can't help but look at someone else’s glowing screen beside me on a plane . It's a similar feeling when I'm working in a busy coffee shop or other public space. I've always known I should try out a privacy screen for my laptop. I finally did it, and now I count it among one of the best MacBook accessories you can buy. No Assembly Required Photograph: Luke Larsen Privacy screens have been around for decades, but I never thought they were for me. I never liked the idea of permanently (or even semi-permanently) altering the display of my laptop due to the adhesives used.…