I think one thing that helps with Phishing emails is to setup a brand new email account that is only used for WoW, never use it for anything else. You will notice that all the phishing emails will go to the old WoW email but not the new one.
I did this following being hacked (believe it was a trojan but no viruse scanner caught it) and I never get email on the WoW account, TONS on the old account masquerading as Blizz.