The craziness has moved beyond BC.

On a flight earlier today a passenger decided he "needed" to sit in seat 11F. When another passenger showed up with a boarding pass for 11F He just sat there and at first said he was a "through" passenger and had a boarding pass. After being unable to produce a boarding pass for 11F, the FA's pointed to their manifest showed him in a different seat, he shifted to "I didn't want to sit in the bulkhead". Finally the young woman agreed to sit in his seat (15 or 16 D), away from the friends she was traveling with.