There is no need for customer service jollies in airport terminals or security staff or anyone not airside to wear hi-vis. It seems that hi-vis has become a badge of identity and as such dilutes the real purpose of it.
Living in a world where common sence is increasingly replaced by policy and procedure. Hi-vis does no good when the person walking and the operator of a vehicle pay no mind to situational awareness. P&P gives a false sence of safety. Hell I trust no-one. This only degrades our intelect giving the companies a legal lack of liability.