Lexxity
I can see where you're coming from, but pax do learn by experience.
easyJet, at STN domestic term, have a habit of setting the FIDs to Final Call, before the aircraft has even landed.
This certainly gets pax to the gate ...... but they are highly p!ssed off with the long wait and no doubt resolve to ignore the screens in future.
The trouble is that they then take this learning to other plces, where this practice is not used and troubel starts.