terrisus, calamari, Quixzlizx, Dalek, thank youuuu
my mind was not quite comprehending it but your replies are helpful. specially the pictures in Dalek's post.
i didn't realise the leg space is THAT tight. But then again, I've only flown Australian / Asian airlines (Singapore Airline, Emirates, Qantas) and ... if I remember correctly, the leg space is a little bit more generous than the ones in Dalek's pictures.
But yes, as for me, personally, if someone asks me not to recline, of course I'd comply !