Will there be riots in Mecca, spurred on by Iran?

The Rocketnews site reports that swine flu, just in case you're wondering, has taken its toll on at least 4 people on their way to Mecca for pilgrimage.

But what if, even worse than that, riots start up again in Mecca, this time egged on by Iran in their current incitement campaign, which isn't just limited to the west? That's something to wonder about. What would the effects of that be?

Update: and this article from a pro-Saudi Arab source is already warning about the possibilities that a riot could happen.