Front-line troops.

Two recent news stories - in Salford, traffic wardens are being kitted out with head-cams, in response to the increased levels of abuse and threats to which they are being subjected, and in Peterborough, RAF personnel are being advised not to wear their uniforms, as that is likely to lead to verbal abuse. Two examples of shooting the pianist because you don't like the tune. Traffic wardens are not responsible for parking regulations, any more than service personnel are responsible for foreign policy, but the problem is that those who are responsible are not get-at-able, so any frustration or anger is taken out on the "pianist". Perhaps the point is that if the problem is that serious, those who are responsible should stick their heads above the parapet and take the flak themselves, and perhaps reconsider the policies which have led to the problem.