The awesome thing is how Google ignores this problem and continues serving Adsense ads on the sites. Not only are they indexing this guy's billions of spam pages but they are paying him for it:

Check out this site: search of eiqz2q.org - depending which datacentre you hit, you will see between 3.8 and 5.5 BILLION RESULTS. Even worse… the domain is EIGHTEEN DAYS OLD. That's right, in under 3 weeks, one person has managed to get one domain 5 billion pages indexed in Google. And they are ranking, too. That particular domain has an Alexa ranking of under 7,000. Another domain owned by the same person, t1ps2see.com, has between 1.7 and 2.4 billion indexed pages and an Alexa ranking of under 2,000… after 4 weeks. Coincidentally, the sites also have 3 blocks of Adsense ads on each page. I wonder how much that one person is earning per day with billions and billions of pages indexed and ranking?

Here's a Step-by-Step Guide to Getting Billions of Pages Indexed by Google.

Update (June23): Google finally banned this massive spammer - Finally :) Justice for all :P