So here is my iteration of the RandomTools script from ken frederick.
You enter a percentage of the items you want to see deleted at random, and voilà, it happens.
Hope this is useful.
unfortunately none of the scripts found on this site will work in cs6. because scriptographer does not and (for the foreseeable future) will not work in cs6.
that said, converting this "RandomDelete" script to utilize adobe's native javascript platform would be fairly easy.
Ken