Turning on "Save and fill addresses" saves all addresses entered. This causes lots of clutter and can result in selecting the wrong information on a form. There should be an option to "Use saved addresses" so only existing saved addresses can be selected for form fields.
No just prevent additional addresses from being saved. Some other form field information entered in webpages even gets added to the saved addresses. Then when trying to enter my address, it auto-populates with this extra info.