Its a thankless job but some some just enjoy the power thing too much.
Once, in London, I had a reserved space but there were 2 workmen and a çone in the way.
I, literally got out of the car to ask him to move it...... 15 seconds.Turned around and a warden was giving me a ticket.
He told me he was on commission.
I took photos and sent details to Westminster council and they overturned it.