This thread has been dealt with before. I'm 6'4" and a half and its always a problem when some inconsiderate sod just bangs his seat back without thinking what the consequence is for the person behind.
I think sometimes the seat incliner may be a first time or infrequent flyer and not be aware of the problem, but if I'm in the middle of 3 seats and the front seat comes banging on my knees, it is just impossible to turn my knees to either side without cramping up after a while. If the seat is not then put up even a little then I have little choice but to have my knees in the back of the seat. Sorry Tightslot, I'm not being thuggish but us big bods always have a problem.