"Hello, is Jacob Haller there?"
"Hello, Jacob. I work for [some company]. Have you heard of us?"
"Oh, well, we specialize in getting websites to the top of search engine results. I've just been doing some research on your industry. Can I ask you some questions about your web site?"
"Wait -- what industry do you think I'm in?"
At this point there was a short, uncomfortable pause. Then he said, "Well, let me just look at your web page for a second."
I then heard him mumbling phrases from my mother's web page. After a little while, he hazarded, "It looks like you're in real estate?"
"Nope," I said.
"Oh, well, ..." he said, and went back to reading my mother's web page to himself.
After thirty seconds more of this I said, "Well, thanks for your time," and hung up.