Recently I found a few forum discussions which seem to point to ads on the content network showing on a publisher site, but then being blocked or "flagged" by security software or security settings targeting doubleclick.
My concern is that we might be getting charged for clicks but people are either seeing a security warning pop up, or nothing at all, due to the doubleclick redirect in the ad url.
The Kaspersky thing got fixed, but what worries me, and always did, is a lack of transparency in Google AdWords, being that search or content.
In one or another way, people pay for what they should not at the first place. There is too much money waste out there, all on account of advertisers, no matter how positive their campaigns are - otherwise they would not run it at all anyway.
All those pennies here and there make millions to Google and its partners in totally unfair, and maybe even illegal way. Internet is yet to be regulated.