You bring up a good point AirxLiban, and theoretically it should be possible to open up a door at low altitude. I still stand by my comment that this would not pose a threat to the safety of the passengers, unless the woman started throwing the passengers out the door.
The reason this would theoretically not be a threat is because all it would do is create a lot of wind and noise inside the cabin, but because there would not be a difference in pressure between the aircraft and the outside atmosphere, then nobody would be sucked out. Keep in mind that even in a rapid decompression, the threat of being sucked out only exists in the short time it takes for the pressure to equalize between the cabin and outside.
To illustrate why opening a door at low altitude would not be a threat, and perhaps somebody else can provide more details, there have been cases in the past where the crew have opened doors or windows in-flight, such as in the case of smoke. It was either a 767 or a 777 recently flying across the Atlantic where the pilots opened one or more cockpit windows at low altitude to get rid of the smoke inside. Also, and I'm not sure if this feature has ever been used in any case, in the 747, you can crack open one of the rear doors at low altitude, again for the purpose of allowing smoke to escape from the cabin.
I hope that not only helps, but also leads to further discussion.
"it's kind of like an Airbus, it's an engineering marvel, but there's no sense of passion" -- J. Clarkson re: Coxster