What bugs me about this, and indeed some previous incidents, is why the 'security staff' or whoever, allow the Pilot they are suspicious of to get as far as the aircraft!
Indeed, in this case, they even managed to board 300+ pax before doing anything. There must have been 30+ minutes notice if this event, during which boarding continued and further disruption was assured.
This would have been far less public and newsworthy had the original suspicions been acted on immediately.
There is a hint of unnecessary delay here that elevated this allegation to headline status.