Originally Posted by Efrem

Isn't opening windows like reclining seats? That is, if the aircraft is designed so that passengers can do it, shouldn't it be OK to use that feature as intended? So, if an aircraft is designed with cranks or controls to open windows in flight, passengers should feel free to open them - for example, if they want a cool breeze. However, using a brick or such to open a window that was not designed that way is like using a sledgehammer to force a seat back if it doesn't have a normal reclining mechanism.