Saved passwords as an anti-phishing measure

My wife gets a lot of phishing emails - don't know why - but she does. Quite a lot of them are ebay ones. She can spot them a mile a way and she says that some of them are quite amusing with their bad spelling and grammar.

Well, this morning she found one that was almost believable. For reasons known only to her, she decided to click on the "log in" link in the email. She said that another clear sign that this was not ebay was because her browser did not auto-fill the login form for her.

We all have heard the arguments for and against using the saved passwords feature. But I had never considered before that it could be a good anti-phishing tool.