The custom of displaying the heads of dead tyrants on pikes was borrowed from the ordinary, if barbaric, exhibition of the severed noggins of criminals by the King.
It was often done to ease the fervor of the howling mob for vengeance. The head was displayed upon high to assure the people that the blackhearted devil was dead. The adoption of the King's methods by revolutionaries should surprise no one, and these acts can be condemned or justified for similar reasons.
In future, I would appreciate it if you did not ping me to a thread unless you wish to dispute or discuss a matter of substance.
You are not my friend; do not presume some spirit of jocular collegiality.