Thinking about this logically (cos I haven't got an engineering brain) wrenchbender must be right.
The sensors will pick up surface movement, irrespective of stick deflection, and will 'lock out' mis-behaving items (plus their opposite number).
The way we currently do the flt ctl check pre-flight HOPEFULLY would pick up any anomaly. We have ditched the routine order of UP DOWN LEFT RIGHT in favour of a random order so that there is less chance of 'reading a script' and more chance of 'saying what you see'.
Interesting topic.