There's nothing to worry about here... tons of phones ship with locked bootloaders, including the Thunderbolt and many of Moto's phones. The One X's bootloader was locked as well, so it's not just a Verizon thing. They are all trying to protect their IP and lower support costs. Someone will have the bootloader unlocked, and it probably won't take long.
Samsung phones have unlocked bootloaders and that makes them almost impossible to brick and very easy to customize. Its nothing like HTC devices (with their S-ON/OFF) or the hacking needed for Motorola.
This is very much a Verizon thing. Samsung have no reason to lock anything and there's no IP VZW have on the phone.