[BrandonM]

The point is not a single visit to a single site. When you have a large ad network advertising all across the web, they are serving you ads on all kinds of sites. A big enough ad provider (think doubleclick or google) gets to see every site you visit and what order you visit them in. They know what times and what days you browse. If that's not an invasion of privacy, then it's at least akin to stalking.

Regardless of what you call it I'm not comfortable with it, and I'm not going to disable my ad blocker any time soon. The only reason I even went to ars technica was to read this article; I'll be happy to not return.

[prodigal_erik]

In fact there is an entire sub-industry of behavioral targeting information brokers out there, reselling your history to ad networks who don't have enough data about you in their own logs.