I literally composed my post excluding the word "crank", because I felt "unpopular, unconvincing hypothesis" was a less judgemental way of phrasing it, and one

I literally composed my post excluding the word "crank", because I felt "unpopular, unconvincing hypothesis" was a less judgemental way of phrasing it, and one that focused on the idea, not the ideator, but you went ahead and used crank anyways anyways, the threshold is likely when the hypothesis becomes convincing enough to a sufficient proportion or number of experts in the field