I've seen comments by several folks well regarded in the industry saying that you should avoid having duplicate links on a page that point to the same destination URL.
The comments basically say don't do it because its spam and/or why do it because only the first link will carry any value and the second and subsequent links are simply ignored.
Assuming that is correct, what happens when there is a site-wide link that is an integral part of the site's navigation but gets repeated in the body of pages. eg... a travel site has "car rentals" in the site wide navigation. Is it spam to place the same link in the content where you are telling the viewer they need to rent a car to go white water rafting through the Widgetville Canyon?
I've always felt site wide navigation links would be treated differently because they are mandatory (the site can't operate without them) whereas links inserted in the body are directional (you can direct the viewer to additional/supplementary resources)
So... your thoughts please. Have we got to the absurd point where repeating site wide nav links in the body is seen as spam?