Buses in Italy

Bus drivers still play happy games in Italy.
And they have become much more sociable than they used to be.
Nowadays they travel in group of three.
You have to wait forty minutes for a bus, but then you get three at a time, so you are amply compensated.
It makes me feel happy and prosperous whenever I travel in three buses at one and the same time.
But crews, on the other end, explain that they MUST travel in groups of three, to protect themselves against the wrath and lynching mood of the public.
"But why should the public be so angry?"
"Because we always travel in groups of three."