before a Tsunami that there are telltale signs of the onrush that is about to occur - and with Slashdot the signal of masses of traffic is about 15 minutes where a tiny trickle of visitors come over before the post with your link goes live on the front page.
Sure enough - 15 minutes after the first couple of visitors came an onrush of traffic to this post. Since that time around 40,000 visitors have passed through this blog.
The focus of the post is adsense optimisation, & keeping your traffic around for a while by placing your outbound link judiciously. I'm with Darren, though. The courtesies of the blogosphere ought to outweigh the economics of the adsense.