As I'm bigger than Mr Boeing & Mr Airbus belive anyone can be. I suffer with "Fat leg activates the Recline button" syndrome. Which means I recline every 2 to 4 minutes prior to take off. However I just put my seat back into the upright position straight away. Knowing that thats where it should be until after take off. I personally don't wait to to be told several times by busy crew to put the seat up.
Yes it is not your fault, but either ask to be moved before pushback because of the fault or co-operate with the crew and do as your told!!.
There's bigger things in life than having to lean forward during taxi & take off, for chrissake.