Agree. Nothing more distracting than a PNF (whether a check captain or F/O rank) "guarding" the controls. You apply corrective rudder during take off or landing and you see out of the corner of your eye the other clown's legs moving. Or more annoying when you see their hands creeping surreptiously towards the control wheel approaching the flare. Or they ever so casually rest their hands on the flap lever or MCP speed or heading knob in readiness for a lightning fast selection. Still worse someone who reaches over with his hand towards the gear lever as VR commences. I wonder if the gurus who teach CRM ever discuss these very minor irritations described here that in turn can blow up into a major "Leave the bloody lever alone until I ask for it".