To understand if a punishment is "poetic justice," we need to know the following:
1. Who is Foulon? Is this a historical figure, a fictional character, or a person you are referring to?
2. What was the crime? What did Foulon do to warrant punishment?
3. What was the punishment? How was Foulon punished?
Here's an example to illustrate the concept of poetic justice:
Let's imagine Foulon was a wealthy aristocrat during the French Revolution who profited from the suffering of the poor. If he was captured by the revolutionaries and executed by the same people he oppressed, that could be considered an example of poetic justice. His actions would be mirrored by his punishment, creating a sense of karmic balance.
To provide a more specific answer, please provide more information about Foulon and the circumstances of his punishment.