I have worked for Verizon Residential(FiOS and HSI) and I assure you that it'll work perfectly; however, I would not recommend that for the reasons I shared in last post. Why worry about so many things when purchase will not save you a significant amount. It can actually leave you more prone to losing money due to reasons like no/limited warranty and no option to swap boxes based on technical advancement, new features, format change etc.
Perhaps your experience is out of date. Verizon's inventory control system has been significantly improved and the provisioning system will not auto-authorize any equipment not in the system.
Rudra - How would one go about activating their own Set Top Box? Should I just rent a cable card and then activate it inside the box? I did notice on my last bill that the boxes show "Rent" so I was thinking that maybe some people would be allowed to own their boxes outright. Thanks!