I talked to other people about such calls. They called me evil. Apparently, people don't see the proposition "Aid is good" as following from "Aid helps people" (a purely factual claim) and "Helping people is good" (which only evil people deny); it's all in the same mental bucket. So we're pretty much screwed explaining it. Moreover, even when people finally get the distinction, the claims tend to be rejected at the speed of thought - because we all know "Aid is good".