I would have to agree with his points, I also found the word 'cooling' to be confusing and I have been here for a while now. If someone was new here and saw the word cooling, I think he would be lost, as nearly everything is related to cooling in some way. You have the category 'power supplies', so if I wanted to talk about changing the fan of the PSU would I put this in the 'power supplies' category or 'cooling'?
But I see where you are comming from Mike, it is pretty difficult to categorise all things related to cooling, since it is not just CPU's at play.
I have an idea, how about something like 'CPU cooling' and then have another category called 'component cooling' or 'other cooling' and finally 'advance cooling'. CPU cooling is probably one of the most talked about subjects and should have a category in it's own right. CPU cooling concerns most people, as it produces so much heat and is the hottest component. Other cooling could handle the rest such as chipset, graphics, harddrive etc. bracketed note for this and finally advance cooling for water, passive and other extreme methods of cooling such as refridgeration.
Something along these lines would be much easier to navigate in my opinion. I have not given too much thought but just 'cooling' I find too confusing.
Probably I will have a better suggestion later but for now good night or good day all.