Just curious how many choose to lean back while sitting in economy? I for one would never do that out of respect for the person behind me and greatly reducing their space even when others do it to me. I have had two laptops who's screens were damaged because someone in front decided to slam back the seat. I have read other threads about this and know there are few airlines who allow knee defender. I have asked SIA to consider asking those on the pre flight announcements to please be thoughtful and consider the person behind you IF you choose to recline. BTW many of my Asian flights are 5-6 hours long and I still would never recline. I am considering stacking the books to prevent the person in front from reclining.