Quest:Fumping

Go to "Refugee Caravan" and head east until you reach the edge into "The Bone Wastes".
Make sure all of your toons have "The Bone Wastes" as their location above the mini map.
Either have a button set up to use the "Fumper" or just type "/use fumper" on all of your toons.
After activating the fumper, cast an AOE to tag all of the worms.
Move all of your toons back to "Refugee Caravan" to have the guards help you kill them.
Loot all the "Mature Bone Sifter Carcass".
This method is definitely faster then just having your main toon activate the fumper and killing one at a time.
Also helps that the guards will help kill them.
Make sure that you are healed and have a Poison Totem down as there is a possibility of 5 worms (if you have 5 toons) attacking at once.