In the 21st century, the phrase "The Pen Is Mightier Than the Sword" has been updated to "The Video Camera Is Mightier than the (Police-Issue 9mm) Handgun".
It is actually almost directly analogous. If the question is: how does a lowly citizen combat the officially-sanctioned power of the state? Then the answer must be: with a pen; or more commonly today, with an iPhone cam set on 'video'.