[mandevil]

Ideally you have several vents perpendicular to the orbital path and open them at the same time, so the vectors cancel out. That's the happy case. If, because we are in the sad case, we can't get that, it's still better to have one piece of debris versus thousands.

[gpm]

Shouldn't the happy case be "we know the orientation of the stage so we can vent in the direction we are travelling to accelerate deorbiting"?