Anyone ever activated a Valet Mode?

[GoodJohnny]

I loaned 98 Boxster to Dad to drive. He's allergic to key fobs, bless him, and he uses the key manually to lock/unlock doors. So when I got the car back, doors unlocked, and opened the driver's door to unlatch the rear trunk, the handle was locked down. Tried the front trunk, same thing. So, I shut the door and armed the alarm/locked doors with fob and walked away to scratch head for a while and knock back a few. Came back, unlocked with fob and poof! the trunks both opened normally with release levers. Just curious if anyone else had tried/experienced this little trick? Almost thought Valet Mode to keep nosy parking attendants out of your trunk. If so, I got a key FOB with dead battery I never have time to replace... would make excellent Valet Key.