If I remember correctly, you have to give bank account info to paypal for your address to show as 'verified' or 'confirmed.'
Since I am not a seller, I do not want them to have my bank info. They have my Amex card number and that's as much as I'm willing to give them.
If I were a seller I would set up an account to be used only for paypal and it would never have any of my normal (paycheck) money in it.