Your going to have fun with this policing these subcategories of LLLL.com Reece.
I don't think that anyone is abusing categories. I've looked at the two categories mentioned and I don't see any that are overly out of place that I would term as abuse. I think that the definition of these categories is controversial and some people including me are listing names that other people may not consider best fitting for the domain. Reece, I am happy if you move any of my names to other categories if my interpretation of how to classify my names upsets anyone.
The categories "Rare", "Pronouceable" and "Premium" are all controversial.
When I bought Muvk(.)com, Ikqi(.)com and Qagy(.)com, I considered them pronounceable and still do to this day. I know that other people don't but I also know that most of my customers agree with me and so criticisms about what I consider pronounceable don't bother me. You can come up with your own rules to classify what is and isn't pronounceable but your always going to come up with the controversial names that some are going to consider pronounceable and others aren't.
What is rare? Aren't all domains rare as they are all unique? This is even more difficult to classify.
Then there is the premium letter debate where affected parties are constantly trying to promote one or two of J,K,U and W to be included in the premium category. At least category is easier to classify but