We know them all and we know the greenies as well. Requires a fair of discipline to train and be part of the brigade. You need commitment and a work ethic.
I remember a farmer being interviewed about 20 years ago regarding a massive fencing program he had paid for and installed himself to exclude predators from a threatened native species on his property.
The interviewer remarked "well I suppose all this makes you a greenie now?" He replied " God no. We class ourselves as "brownies" because we get out and do they work. The greenies sit about complaining about everything"