When your ads get syndicated out to an advertising network, all bets are off.
Amen! We completely agree with Don's position.
We've written about the relationship between content syndication and PPC click fraud many times. It is good to hear folks from the engines speak straight about the average quality of content network clicks. There are some good clicks to be had there, but they're needles in haystacks.
Don, to really raise the bar, how about MS offering itemized click reporting?