In terms of the road rage insident, I too sympathize with the perpetrator. I'm sure he's a perfectly normal sane, rational human being in the real world. The trouble is Manchester Airport is not the real world - it turns normal, sane, rational people into stressed out monsters. capable of violence. Everybody has a breaking point.
The only pressure that will count in the long run is pressure from airlines and concessionaires. As far as MAN is concerned the passengers are below sh!te and are there to be fleeced, shouted at, abused, have snide remarks made at them and basically treated as a commodity.
In fact I would say in mitigation - 'extreme provocation' by the airport management