Stupid boarding experience at ARN yesterday. Arrived a bit late from the lounge so didn't hear what they had announced, but the automated boarding gate displays were showing "Groups 1-4" and people were going through. Several people in front of me in the queue got the red beep and the gate agent announced "it's only for groups 1 & 2" - to which people then countered with "But it says 1-4 up there" - "Yes, but listen to the announcements!".
Seriously how hard is it to keep updating the display with additional groups?