Well I giggled yesterday morning (and perhaps also somewhat saddened by the state of people's mental well being) when this happened:
Sat in 1A for my Monday morning commute to LHR from ARN. (Now just as additional information; Stockholm is a provincial town in Northern Europe packed with insecure people who think they live in a Cosmopolitan World City which is just as hip and cool as Williamsburg, leads Fashion and Architecture and is generally just so hot right now and trendy OMG.)
The rest of row one is occupied by let's say three men that fit in with the above quite well. We are 20 minutes late from ARN due to ATC restrictions due to Imogen bashing southern England. I over hear them discussing and being concerned whether they will make their connecting flight at T5.
So I thought I could be of some help as it is safe to say I know my way around T5 pretty well.
I ask the chap in 1D "Sorry, what time is your connecting flight?"
He replies: "Los Angeles"

: in a snotty tone( (Ok, you really want people to know you're going to LA... OMG LA is so hot right now in Stockholm)
To which I reply: "Sure, what time is the flight?"
Response: "10:30"
I reply: "ah ok, well that will be tight but BA will rebook you on the next one so should be all right".
Response in same snotty fashion: "I know we do this trip often".
At that moment I decided to not waste any more time or oxygen on this person.
Later during the flight, I spotted 1D looking at their phone and mobile boarding pass.
BRONZE