Why Googlebomb?

Why are webloggers googlebombing online poker?

I assume it’s to reduce the attractiveness of spaming the blogs with the term. Wouldn’t you want positions 1-10, rather than just #1, and really shut the action down? I don’t see that it will. But wikipedia will be regarded as a more relevant site, and that’s gotta be good, right? Speaking of which, I must go check for vandalisim on my pages…