1. Badspot has no authority over game servers; they're not hosted on his network at all, it is technologically impossible for him to restrict access to them
2. He can't remotely block a mac address (or an IP address) for you, unless he has access to your router control panel. You need to do it yourself.
3. The IP address the attack is being logged from often times isn't the ip address of the attacker, as one of many examples, attackers could be innocent users infected by malware that has turned their computer into a zombie in a botnet,
4. Most importantly, blocking an IP address from your home router won't do anything to block a DoS/DDoS attack