It is a disease which affects a small group of attendees at football matches, cinemas and concerts.
Yet there seems no way to cure the boring specimens of early leavers from their condition of perpetual itchy-feetedness at major events.
At Plan B’s forest gig at Bedgebury Pinetum, Goudhurst, on Friday, June 22, many of these party poopers were out in force.
The rapper – real name Ben Drew – is in an awkward position. He earned swathes of fans for his triple-platinum soul record The Defamation of Strickland Banks but a sizeable group of these are unlikely to appreciate his return to urban music on follow up album iLL Manors.
His third record is the soundtrack to his warts-and-all crime drama film of the same name about life on the streets of Forest Gate, London.
Plan B did his bit for fans of his soul-based second record (his first album Who Needs Actions When You Got Words is all but forgotten these days) devoting the whole first half of his concert to the album.
But it was insulting that as soon as he rounded off this part of the show with his smash She Said, many of the crowd decided they had seen what they had come for and left with about an hour to go.
There has never been any sense in leaving something early. People who walk out of cinemas when they are not enjoying a film are selling themselves short. Anyone who walked out dissatisfied with the pace of the Sixth Sense would have missed arguably the greatest plot twist of all time.
Football fans who thought they had seen the writing on the wall of Manchester City's title hopes and left the Etihad stadium early back in May missed out on the most dramatic end to a Premier League season in history.
The second half of Plan B's concert was no Marvin Gaye-fest but fans of this type of music could have broadened their horizons and might have discovered something new to play on their hi-fis at their Saturday evening get-togethers.
And for those who did stick around they perhaps caught a glimpse of a world they would not normally find themselves a part of - seeing their first moshpit, their first beatboxer or discovering they liked drum and bass.
Yes the early leavers might have been tucked up in bed by 11pm but is avoiding traffic really what life is about?