Not at all. I just like to be comfortable. That's the purpose of the reclining seat, isn't it?

Obviously one should be aware of potential collisions with the occupant of the seat to the rear. And if there is someone behind who physically takes up so much space that reclining is impossible without crushing him I suppose allowances have to be made. I would grumble about it though. It's the dang airlines' fault for putting the seats so close together anyway.