Ravers, basically. They party, they steal food and cook it in to elaborate feasts which they share liberally, they create wild pieces of art that range from the lovely to the... not lovely, which they give away for free, they have sex as much as ninjas flip out, and they move on before they ever have to deal with the consequences of their actions. They like loud music and tipping cattle. Sometimes when they're drunk they go mutilate a bunch of farm animals or molest the farmers daughter, and generally leave those damn pellets everywhere.
Instead of pellet implantation killing the host, it should transform the host in to a slaad (or rather, slaad-like creature), much as a chaos beast transmutes others to chaos beasts. However, this transformation just causes the creature to become mottled and warty (or otherwise amphibious) and lose all sense of responsibility or obligation, turning chaotic in alignment (good/evil unchanged).