An experienced PPL holder once told me it was possible to yaw a Cessna single into a turn by opening one of the cabin doors.
Yes, but it doesn't work the way you'd think. Opening the left door will make the plane bank to the right. The doors are too far forward to act as a rudder, however, opening a door will force more air over that wing (compared to the other wing) and therefore cause it to lift a little more, and bank away from the opened door. That said, this is inadvisable, as the doors are not designed for this, and expensive to repair when a hinge, or the door structure is cracked from unintended loads. On floats, we may open and hold one or both cabin doors when sailing, to benefit from the wind.
When I flew jumpers in the 182 and 185, they had a right side upward opening door. The pilot opened or closed the door by use of the rudder. The position of the door could be controlled with pleasing precision this way.
Do not fly 100 series Cessnas with both front doors off, not approved, and unsafe.