The lounge people can see everything BA have on you on file, this includes:
Your FSB score,
Lounge seating preference,
Attire on previous visits*,
Number of times you've tried to get the entire family into the lounge travelling Y, with just 1 silver card among you.
How cute they thought you were out of 10,
How cute the check in agent thought you were out of 10
*This explains the large amount of typing, as it reflects the fact that they had to describe the Hawiian shirt you were wearing noting every lurid detail.