China Search Engine Watch blogged about a demonstration by advertisers outside Baidu’s Beijing offices: (sic)
On August 4, 2006, some advertisers gathered outside Chinese search engine Baidu’s office building and demonstrate against its click faults. From the post boards presented by the demonstrators, it was said that 70% of clicks on Baidu’s paid ads were invalid. The claimed data was notarized by Beijing Notarization Bureau. The advertisers came to the building during lunch time and were expelled by the security guards.