I've seen a couple of people lose their laptop displays to reclining passengers. Both times the people got pissed at the recliner. IMHO it's the laptop user's responsibility to keep an eye on the situation and use their laptops at their own risk.
I think it's a shared responsibility. There just isn't that much room in coach, and a pet peeve of mine is when the person in front of me quickly slams back. As a rule, I generally don't recline my own seat in coach, but if you need to do so, all I ask is that you recline slowly.