Ya know, that's actually a good question. My idea was to remove the page entirely from the graph as it serves no real purpose in the overall scheme of things. I'd rather have the bot spend its time following links on other pages that are of higher importance.
But, I do understand where you are coming from, you could just noindex. Mind you, these are the "poor man's" method of having some control over indexing routines. There are of course other more efficient ways to do this.