> There are of course some people who are genuine frauds. How can you distinguish between x calling y a fraud because x is a hater, and because y is a fraud? Look at neutral opinion. Actual frauds are usually pretty conspicuous. Thoughtful people are rarely taken in by them. So if there are some thoughtful people who like y, you can usually assume y is not a fraud.
Just look at recent history- Enron, WorldCom, Bernie Madoff, Elizabeth Holmes (and many more) were ALL widely celebrated by neutral third parties before being exposed as frauds. Neutral opinions are often neutral because they haven't done much research on a topic. Thus, they are often relatively uninformed opinions.
And these frauds were NOT conspicuous at all. They worked very hard to present the appearance of success. It took some dogged investigations from "haters" (by PG's definition) to reveal the truth.