One source of your frustration is that you're viewing all the individuals on Twitter as if they're a single entity that's also adamantly against profiling. "how do you make a case that it's unethical for dragnet traffic..." You're assuming they also hold other popular views you've seen on Twitter, then calling them hypocrites.
Some want to define terms with clear broad strokes and become frustrated when their observations don't lie clearly along those partitions. A good experimentalist would then simply change how they define things in order to have partitions that match their observations more closely, but that is not the case for most, especially if ones living depends on it (observations tend to be highly skewed).
Something about infosec/def contractors arguing ethics I find quite comical, especially since governments and their contractors don't sit down with AT&T and the like and discuss the nuances surrounding the ethics of what they wanted done with customers of such over crips and tea (at best it was probably limited to lawyer speak with the providers in some secret court with secret rules),and then discuss how most of the work would be outsourced to private companies/individuals to "protect information" (information collected from providers who collected it from customers) from the "outsiders" (customers of such providers).
