Originally Posted by
Global321
One other thing to consider... the basic premise is flawed.
I have never seen a delay/line AFTER screening of anything more than a few seconds. Even then it is just because screening is moving things along and several bins are coming out quickly.
If there is a delay pre-screening, it is because security has not moved the mound of bins waiting to be moved. And no amount of passenger stacking of bins will change that.
So the idea of stacking/not stacking having a material effect on wait lines seems false.
It's more a matter of courtesy than efficiency. I'm Pre, but in the regular lines I've often had to stack abandoned bins myself to get at my bin that's still in the machine shrouding unable to roll down.