ken_b - 2:40 pm on Feb 25, 2012 (gmt 0)
I haven't taken any actions beyond removing AdSense from the targeted page.
On my site, it looks like this strange traffic is slowly dropping off. It has dropped off about 10% for each of the last two days, so now down about 20% from the peak. Hope it keeps going down, only faster.
Anyone else seeing a drop in this traffic?