If you get any guy that's over 6' leaning forward in his chair, it's blocking your view regardless where you're sitting. I'm in section 204 and I had some dude lean forward in his seat the entire game. He was a bigger boy, so his lower back was against the seat back but since he likely was squished into the seat it was probably comfortable to lean forward a little to give some of his bulk room to expand.
I felt like a goalie trying to fight to see the puck through a screen on the penalty kill
You should have slashed him in the back of the legs a few times to let him know you were there