Originally Posted by codex57

Hypothetical question:

A big problem with the "reserving" overhead space is that the FAs are specifically not required to enforce this. So, what's to stop someone in MCE, upon finding that someone not in MCE took up their overhead space (perhaps after asking the other MCE passengers) from just taking out the offending luggage, setting it on the ground, and putting their own luggage in?

Wouldn't that force the FA's to get involved? What would happen? First come first serve, and the late coming MCE passenger has to move? MCE passenger gets his supposed "reserved" overhead space, and the FA has to go track down the owner of the luggage lying in the middle of the aisle?