Adsense | Google Data Retargeting Helping Your Competitors?

In March of last year, Google cam out with Their Own form of display ad retargeting, They named it remarketing.

Basically lets you remarking show ads on Third-Party Web sites to People Who Have visited your web site. If They visited your web site to learn about flowers you sell, They Can then see your ad on a flower That blog runs AdSense. That, in a nutshell IS remarketing or retargeting.

I spotted a WebmasterWorld thread Where one advertiser IS Convinced That history is history pixels Trade Site is Being Used not just for remarketing Purposes for historical site for historical purpose aussi Competitors.

He said:

We Have Overwhelming Evidence That suggests Google is Utilizing the clickstream data Collected from our client 's Adwords retargeting pixels (ie "audience ") to serve ads Competing on the Adsense network.

I do not follow Google 's display network Closely That goal I ' ve Never Seen a Complaint like this before.

I assume if it works this way, I am sure it Can Also work in the reverse Where your competitor 's data as well Help You. Is That a bad thing? Seems so?

Forum discussion at WebmasterWorld.