What fate do those in the vestibule experience?

Those in the vestibule of Dante's Inferno experience a unique punishment that reflects their indecisiveness and lack of commitment in life. They eternally chase a banner, which symbolizes the fleeting nature of their ambition and desires, while being stung by wasps and hornets. This punishment highlights the idea that in life, those who fail to take a stand or make meaningful choices face consequences in the afterlife. The stings represent their torment and agitation for their inability to find a definitive purpose or direction, constantly moving but never achieving peace or satisfaction. This reinforces the thematic element of the inferno, which focuses on the moral implications of one's choices and actions during their lifetime.