Temperature is not a good category of questions. It doesn't group areas of interesting into a useful topic.
Just to open up discussion, here are my initial thoughts regarding the current 3 questions. Please keep in mind that some of the tags I suggest here, don't exist yet.
What is the temperature behaviour of a Raspberry Pi in an enclosure?
Should be tagged case, which it already is. Could also be tagged cooling in addition.
I'm slowly starting to think we do need a temperature...