No, sadly you can bypass that and not deal with them and connect a second router anyways. What will happen is if you use that second router the modem will see it as a single address and treat it as a single device. Remember to set your ips differently. If your root is 192.168.1.1 change the other router to say something like 192.168.2.1 so the devices dont get confused on the network. Its a simple way to bypass their nonsense.