It's not quite as terrible a trend as using your massive tablet as your go-to camera, but smartphone users who shoot video in portrait mode run a very close second when it comes to annoying habits.
Not only are the thick black pillarbox bars on either side of the video extremely annoying, but the human eyes are designed to see the world in widescreen. That's why they sit side-by-side, and not on top of each other. And sure, sometimes it's just easier to hold your phone vertically in one hand to capture a scene. But if you take the extra second to turn it sideways and use two hands, you'll capture loads more resolution and the footage won't look like you're riding out an earthquake. [YouTube via Laughing Squid]