The security at Hebridean airports would indeed border on the farcical were it not for the distressing effect on many passengers (not just the elderly and infirm) in situations where many are known to the staff.
Personally I will even brave the Calmac crossings in the depth of winter rather than subject myself to the indignities perpetrated by the jobsworths. Their excuse is that they never know when there might be a random inspection going on.
Quite frankly I do not believe that a terrorist would find it worthwhile in publicity value to target a Saab 340. Certainly that was the philosophy in New Zealand four years ago when the security screening in small airports was much more relaxed.
But then there is no place in the Bureaucratic Handbook for common sense. Mindless security is not good security.