The Potemkin Moment in France, 1789
If, in the French context, we mean by the "Potemkin Moment" the brief period when it became a truth universally acknowledged that the Feudal Era was so over -- that is, feudal social relations had come to an end -- July 1789 seems to be that moment (and hat tip, the Revolutions podcast 3.12, for making me see this). The Potemkin Moment was The Great Fear:omc
Between June and the beginning of August there were riots in the countryside. Peasants burned their nobles' chateaux, monasteries and buildings which housed public records. They particularly targeted documents which contained records of their feudal obligations. It was called "The Great Fear" and spread quickly throughout France.
Another source (I'm trying to make up for the lack of scholarly cites with volume):
The main targets of the subsequent uprisings were the seigneurs, to whom the peasants were obliged to pay feudal dues and the corvee. The chateaux (grand homes) of the seigneurial nobility were attacked and looted (wine cellars were often the first target). Written records of names, debts and seigneurial obligations were keenly sought and quickly burnt. Sometimes the nobles themselves were held captive and, under threat, forced to renounce their rights over the peasants on the estate. The uprisings began in the south-west of France but quickly spread, reaching their peak in the last week of July. The response of the newly empowered National Assembly was to dissolve most vestiges of feudalism during its famous night-sitting of August 4. The Great Fear fizzled out a few days later, although sporadic peasant uprisings would continue throughout the revolution.
And there are more examples in Kropotkin's The Great French Revolution 1789-1793.
Now, I'm hard-pressed to come up with a contemporary parallel. After all, our equivalent of the terriers, the feudal registers relating to land (a sort of paper-based GIS), are off in The Cloud, in a server farm somewhere in Utah, or Oregon, or North Carolina. The peasants can't get at them. In fact, the closest parallel I can think of to burning all the property records in France would be the clouded titles created by MERS, which was hardly a revolutionary act. Or was it?