Search is their primary business though. I can't see them jeopardizing that by blacklisting a random competitor that poked fun at them in a presentation. It mak

Search is their primary business though. I can't see them jeopardizing that by blacklisting a random competitor that poked fun at them in a presentation. It makes no sense. However, they're the only ones that know their ranking algorithm. This means they can tailor their sites for the best possible ranking. It also means they can rewrite the algorithm in ways that better rewards Google (Let's give a boost to sites with the highest traffic, and exponentially drop off the boost as traffic decreases. Oh look, it turns out our own Google.com is quite popular, all of our services are under that domain, and they'll all see higher rankings).