I agree with you about the SS#. Too many people give it out too freely, consequently way too many people have access to it that shouldn't. I disagree with you about the Driver's License Number though. Your state isn't allowed to disclose or share your DLN except as specifically allowed under federal law. It can be used as a secondary means of identification and used by identity thieves.
Your cable company, or any other business you deal with, should be asking for your account # with them, or your phone #, in order to identify you in their system. Anything else puts your financial (and possibly personal) safety at risk.