The Cardamine . Everyone is freely to decide if they use it or not but the problem is this : The way the Outcasts use it and their Orange Dream.
Plus , all the things panzie said above.
Example, when some GC transports pass with carda for their ceremonies , we let them go away *grins*. They use it for their ceremonies or whatever they do. Not to spread an infection , while the OC just want to make people addictive so they can win more money and possible slaves, manipulating people. With every transport we kill , we basically save other sirians from getting addicted and at the same time , we almost kill those that are addictive. But the ratio is pretty good so we take the chances.
Simple ? We hope that we will get out some docs where we will exaplin some stuff but will take time .