We all know that airline seats are close together -- just a fact of modern day life. I generally use an iPad with a small Logitech keyboard when traveling - fits perfectly on an airline tray, and gives me just enough room to type/text. But then, WHAM! With no warning, the person in front of you slams their seat back to give them an extra inch or two of angle in which to recline. That generally sends my iPad crashing into my chest (fortunately, it hasn't snapped in half yet!). Now it is impossible to type on the keyboard, unless I hold the device at an angle, resting against my chest, with my elbows splayed out. A laptop, even a small one, would be impossible on which to type (I think even the Microsoft Surface Pro, or the new Go, would still have these same issues).
Can we make it a thing, that before you recline your seat, you politely turn to the person behind you and give them a little warning? A little courtesy goes a long way! And in the interest of full disclosure, I haven't reclined my own seat back (in the interest of the person sitting behind me) in many years.