While I appreciate the need for security, I have issues with the contact methods
When I sign it, occasionally I get the message to verify my backup email address in case something happens to lock me out of my account. Good. No problem there but now it has been added that it wants a phone number and it is stating it as a mandatory field.
I don't see any reason I should have to get a cell phone just to satisfy yahoo's need for security. If you want to have that option, fine, but I don't expect to be a condition of service.