If you don't actually smack someone in the back of the head or step on someone's foot you're doing fine.That's what happens when the seats are mashed so close together. The lack of any legislation mandating a minimum seat pitch is actually the subject of current debate. Some people (including myself) would argue that it should be regulated for safety reasons. With so many people packed into increasingly smaller spaces, it would be more difficult to evacuate in an emergency. Not to mention health issues like deep vein thrombosis.