I have never given WGT a credit card number. Likewise, I have never given WSOP a credit card number. And neither has my phone numbers. Yet both my phones ring a lot with numbers I do not recognize. Do I answer these unknown numbers? No way. I wait to see if a message is left.
The same is true of emails that arrive at several of my in boxes. I, too, use a throw away box. I don't open most of the mail I get at any time simply because there are so many scary things out there. Real safety in this world today is to be like Jack Reacher: off the grid.