T-Rex a Scavenger?!?

[sean.kerns@sdrc.com (Snake)]

Hi, all:

Anyone have any comments on this? I saw a Paleoworld episode recently
in which Jack Horner asserts that he believes that T. Rex (and by
association, all tyrannosaurids?) were not in fact predators, but
instaed were essentially gigantic vultures...
Now, several things hit me wrong about this:
Why would he need all those teeth simply to pick at roadkill on
the side of the Mesozoic freeway? Certainly, he could have got away
with much smaller teeth and jaws. Nobody's gonna pick on a vulture
that size...
Horner apprently justifies his theory based on, among other things,
that T.Rex has a capacity for a really sensitive nose, and so do
vultures. Ergo, if vultures have sensitive noses, and they are
scavengers, and T. Rex has a sensitive nose, then he must be a 
scavenger. I know better than this from Philosophy 101.
What other use for such a sensitive nose? Maybe to track prey?
Like snakes, or any number of other predators.
Also, he made the comment that T. Rex couldn't  be a predator,
since he couldn't "see how they could catch anything." What are those
huge legs for, then? To bend over more easily? From all that 
power-walking to the next roadkill? 
Now, most predators won't pass up a free meal when they're hard
up for food, but that doesn't make them scavengers.
By Horner's reasoning, Alligators aren't predators, either.
Anyone care to support this claim, or offer more info?
Thanks.

Sean (disillusioned at the thought of a 40 foot vulture...)
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