Subliminal Advertising: How far will fans go to help authors get noticed?

An old friend emailed me last night and told me the funniest story about how he helped promote me. Here's his email:

I was in Chapters with my wife and the kids on the weekend, and I went to look for CKT in the mystery section, and there was NOTHING! I went to one of the computers, and while you are listed, stock was ZERO.

I was waiting for my wife, so while I waited I went to ALL SIX of the computer terminals, searched for Cheryl Kaye Tardif, clicked and left up the page with YOUR name and YOUR t