"The biggest threat facing authors and publishers today is not piracy, it's obscurity. Anything that makes a book less accessible and less enjoyable makes it more obscure."
This may be true but the Internet has made everything, including books, several orders of magnitude less obscure. Even in the days of BBS systems it was far easier to find things.
I spent years trying to find a Time Magazine article with no luck. It took a while on the Internet because I had "remembered" the wrong date.
But it was very obscure and now I have it.
Shoebox
If you are paranoid remember that anything that fit in a shoebox then would be about a pin head in size and hold more than 16 words.
THEY might well be listening.