Cranks can be annoying, its true. However, sometimes cranks are cranky for good reason, namely because the present system is onerous, biased and domineering and requires a new paradigm in order to make it ethical at all. And that is the more important point of course…even if the crank’s solution is piecemeal or even wrong.
For instance, who cares whether interest can be mathematically paid under ideal conditions when its (and other costs) enable a single business model to dominate and manipulate individuals, national economies and entire geographical regions? Holding up this sort of erudite idiocy as insight is all too prevalent in modern, intellectually fragmented and compartmentalized higher education. Integration of the particle of truth and rejection of untruth/half truth as always is the process and evolution toward Wisdom and a gracious unity.