I would recommend reading further in the thread (including the terrible remarks made against Ms. Tweeden by the “enlightened”). There are many arguments for and against the validity of the EXIF data, and whether it can be altered. Also, when compared to the TIMEZONE in which it was taken – the time of the photo was not PM, but AM, a point conceded by the originator of the thread.
You will also find arguments regarding the configuration of the seating for the aircraft – as if jump seats could not be present on the interior walls of the fuselage at the same time as other seating in the center of the aircraft. Until the photographer comes forward, and gives their account, all this speculation will be seen as making excuses – a thing the right has been justly accused of doing. Sink to their level, and you sink in their swamp too.