Sometimes, one can be caught off guard and when asked this kinda question, out of the blue, it can send up all kinds of red flags.
- Is this person some kinda pervert ??
- Is this person gathering information I don't want him/her to have ??
- Is this person getting too personal ??
- Is this person being too nosy ??
- Is this person gonna be waiting for me sometime ??
- Is this person gonna look up where I live ??
It could happen, so I'd just kiddingly say, whatcha need that fer ?? Writing a book ??
If they are just wondering if you're the owner or related to the owner, nothing much to it. Otherwise, they'll just say.... Oh, I don't know, just was wondering.
As for on the card, it kinda says it all. You are letting yourself wide open, but I don't think people are gonna do-ya-in by knowing your last name.
Be the judge and post a picture up in back of you that states, these premises guarded by a double-barrel sawed off..... or