Obtain Doomclaw's Hand and deliver it to Mama Wheeler at the Midrealm Post inside Eco-Dome Midrealm in the Netherstorm.
You know what might just discourage them? Take out their leader!
It seems to work everywhere else from what I've heard. And when they see a $g grizzled : tough; [class], such as yourself take out their leader... why, I bet they'll tuck tail and run for the hills!
Get back in there and take out the big one they call Doomclaw. I hear he keeps himself in the eastern part of the Scrap Field underneath the pipe.
Bring me his claw, too! Maybe we can make use of it.