I'm the author. In all my free books I have collected email addresses only for very rare events. How rare? In 15 years of publishing free books I've only used

I'm the author. In all my free books I have collected email addresses only for very rare events. How rare? In 15 years of publishing free books I've only used the books' email list once: I used a previous book's list to let people know that Edition 2 was available. If you put in fake information, my little collector is none the wiser. Or just click on the "without honor" link, which is really there so Google can grab it.