Some guy wearing a tag that said BBB.org just knocked on my door and said that he was in the neighborhood delivering free energy-saving items to households. He offered me a box of 10 CFL lightbulbs, a sink aerator, a showerhead, and there may have been something else, too.
I said, "They're free? Great!" and he said "And of course I have to come in to your home to install the products" and I said "Goodbye" and closed the door.
Was he running a scam of some sort?
(The local BBB office is closed for lunch. I'll check in with them in a few minutes.)