Twits who can't get to concerts on time

Bloody heck, it's not brain surgery.
If a show starts at 8, get there at 7:50. Instead, all these self-absorbed people stroll in up to a half hour late, making people who are already enjoying the music stand up, shuffle around and lose the focus. These dirtbags wouldn't dream of being late for a business meeting or a doctor's appointment.
The concept of "fashionably late" does not apply to shows.
Solution: lock the doors at 8:01 and don't let them in until intermission. And if they get angry, revoke the ticket and boot 'em out.