As we all know that we now have access to Shattered Sun daily quests. Most servers are now at the last phase and will probably have the same quests available.
Shattered Sun Supplies - Shattered Sun Supplies - Item - World of Warcraft
In each of these bags, there is a chance that Badge of Justice can drop.
For me, it was hard to do heroics and farm these badges, because I didn't have the gear for PvE. All I did was PvP. And I needed Cloak of Subjugated Power - Cloak of Subjugated Power - Item - World of Warcraft
After one day of doing these daily quests, I got lucky and picked up 3 badges. I don't think this is the best way of farming badges, but if you're sitting around doing nothing mind as well do these 4 simple quests.
Blast the Gateway - Quest - World of Warcraft - Blast the Gateway
Sunfury Attack Plans - Quest - World of Warcraft - Sunfury Attack Plans
Rediscovering Your Roots - Quest - World of Warcraft - Rediscovering Your Root
Maintaining the Sunwell Portal - Quest - World of Warcraft - Maintaining the Sun....
1. Here's how I start. I pick up the last three on the list from Shattrath.
2. Fly to 48, 8 Terrokar for Rediscovering Your Roots and finish that quest.
3. Fly to Thrallmar (Hellfire Peninsula) then Throne of Kil'Jaeden @ 57, 17 to pick up Blast the Gateway and finish that quest.
4. Now if you have an epic flyer you fly straight to Netherstorm for Sunfury Attack Plans or Take a flight to Evergrove in Blade's Edge and do Maintaining the Sunwell Portal @ 51, 17.
Both of these quests can be done vice versa.