Seeing as how it's common practice to re-use addresses I'd say the users have already decided. Why should you, the 15% mining pool host say otherwise?
 
Satoshi wrote it into the white paper as an additional privacy measure not as a mandate!!

""As an additional firewall, a new key pair should be used for each transaction to keep them from being linked to a common owner. ""

Who are you to penalize me based on your personal opinion?