Why is Number Private?

For the privacy of the owner. I will want 2 numbers, and I don’t want to disclose the numbers so SPAM bots looking through my sites will only find numbers that belongs to me. This is important to make a distinction, and not note the number on the site. Since SPAM bots can’t find the number, there is no number they can SPAM. I am willing to receive SPAM calls and faxes going to my voicemail box which will mean that my fax/vm number will be made public, However, I do not have that number, and therefore no right to disclose the number on this or any of my sites.