rgd1101 :
                
        
                
                    
                       No. mac address are not broadcast 
                    
                 
             
         
Technically, they ARE but they're not going to show up beyond your local network as IPs are tunneled and NATted. Here's part of my local ARP table on my workstation and you can see a section of the network-bound MAC addresses...
  192.168.1.100         f4-0f-24-95-f4-cb     dynamic
  192.168.1.101         80-e6-50-01-78-a8     dynamic
  192.168.1.103         dc-a4-ca-5f-26-4f     dynamic
  192.168.1.109         00-15-5d-41-90-03     dynamic
  192.168.1.113         00-22-2c-80-8a-3b     dynamic
  192.168.1.116         c8-3a-6b-1a-80-bd     dynamic
  192.168.1.117         00-15-5d-41-90-02     dynamic
  192.168.1.119         60-a4-4c-a7-3d-6d     dynamic
  192.168.1.120         7c-bb-8a-87-20-fc     dynamic
  192.168.1.121         d0-03-4b-40-a3-90     dynamic
  192.168.1.124         4c-34-88-e7-0c-d9     dynamic
  192.168.1.134         08-66-98-a0-46-9d     dynamic