Years ago I chuckled to myself when I selected Admiral from a dropdown when buying tickets for a gig.

Tickets arrived fine, went to gig, etc.

But the events company must have sold my data in a big way, because for years later my parents continued to get all sorts of junk mail to the admiral of the house.

I (jokinglyl selected Sir for a ferry crossing from Portsmouth to St Malo. Months later, forgetting all about it, my family and I are welcomed aboard by the second in command. He looked puzzled. I realized the reason for the welcome a few days later.