Sticking them to my fingers when handling them, falling to the bottom of the jar, etc. Have you made dry sift? Ripe thricome heads seem to fall off rather easily. Probably weed is not so much tumbled as mentioned on another thread but roughed after harvest.
But even if there is nothing to this "protection" thing, the point still seem to stand that its easier to trim a couple of buds each time than a pound during a weekend.