Sasha, you must have a very...non vivid...imagination. I envy you that. I truly do. See, I have a fertile imagination, and sometimes it leads me places I dread.
I have had nightmares about my young child getting lost--at the zoo, the museum, when they're out with dad, pretty much any place I'm not--and being unable to get help because they don't know their name or address or phone number. If they can't tell the nice policeman "I'm A-- W-- and my daddy is L-- and my mommy is J-- and I know our number is 9-------- (including area code)", what happens?
What if I am unconscious and the home phone isn't working? How is my 7 year old supposed to call for help on the cell, since it doesn't have a location associated with it in the 911 system?
What if we are hit with a hurricane (we're in FL) and we get separated, for whatever reason? Who can they go to for help?
My kids are prepared--not for everything that may happen--but they know not only the home numbers, but cell phones as well (well, not my husband's new one, we are learning that right now, it's only a few weeks old); the home address, including city and state; mom and dad full names; and their full names and birthdays. My oldest is 21, 2nd is almost 18 and 3rd is 7; and they've all been coached on these things since they were able to know what a number was.
Also, they have a small, basic knowledge of first aid (how to stop bleeding using pressure, call 911 if it doesn't stop, etc) and the older ones can start a fire (which the 7 year old will be learning this year at our family campouts) if need be. They are also learning how to cook and clean house, and how to budget their money. Yes, at 7. Because these things take years to learn, and if you don't start young enough, you have 21 year olds in college running up $$$$$$$ in credit cards and eating nothing but ramen noodles and living in piles of garbage. Because someone else isn't doing it for them...
The only reason, in my humble opinion, for a child not being able to recite where they live or their phone numbers is a disability. Otherwise, it shouldn't be an issue by no later than 1st grade. Just as they should know not to get in a strangers car or eat the black jelly beans...
Sorry, I'll hop off the soapbox now.