This is irony.
In the very memorial for the most ardent fighter for liberty and opponent for State power and control over people, Thomas Jefferson, a student gets arrested for daring to ask what laws she was breaking by quiet celebratory dancing on his birthday.
Of course, the real irony here is that all of this happened at the Jefferson Memorial, in observance of Jefferson’s birthday. Go out to celebrate the birth of the most hardcore, anti-authoritarian of the Founding Fathers, get hauled off in handcuffs. The photo’s almost poetry, isn’t it? One of history’s most articulate critics of abuse of state authority looks on as a park police cop uses his elbow to push a female arrestee into one of said critic’s memorial pillars.
There’s video on that site showing what happened.