We may object to speed traps but they are there for a purpose, to stop those who lack a sense of responsibility from inflicting there speed powered pandemonium upon us innocent law abiding(ish) citizens.
There is a certain sense of justice then in the story of the french protester, who belongs to a group which blow up road speed traps. Unfortunately, whilst assembling his home made bomb he managed to blow both his hands off.
But look on the brightside, at least he'll have to use a hands-free mobile from now on!