WordPress Splogs

Google addressed the splog problem in blogger.com. & this was a welcome step for marketers advertising through Google Adwords. But seeing Google ads onWordPress based splogs causes concern. One such splogs network I found :

http://college-news-info.com/
http://www.cancer-news-health.com/
http://www.auto-info-news.com/
http://www.diet-info-news.com/
http://www.loan-info-news.com/

When is this going to be addressed, Google?