It would be very helpful to have the ability to NOT import keywords when importing images. For example, I was reworking my large LR catalogue with older images that I had keyworded before I really know how to do keywords and all the mistakes (all caps, no heirachy, etc) came into my LR keyword list and made my keyword list unusable. As mentioned in a previous post managing keywords in LR is an exercise in frustration and dealing with all these mistakes in a 100,000+ image Library is untenable.