Mcafee Siteadvisor posted this
http://www.siteadvisor.com/studies/search_safety_dec2006

http://www.siteadvisor.com/studies/overall_by_engine_12_1_06.png
http://www.siteadvisor.com/studies/by_type_12_1_06.png

1 – "Red" rated sites failed SiteAdvisor's safety tests. Examples are sites that distribute adware, send a high volume of spam, or make unauthorized changes to a user's computer.

2 – "Yellow" rated sites engage in practices that warrant important advisory information based on SiteAdvisor's safety tests. Examples are sites which send a high volume of "non-spammy" email, display many popup ads, or prompt a user to change browser settings.

McAfee's title can be misleading: this is about the safety of search results, i.e. how safe the sites are which the search engines present. Some might confuse this with how vulnerable the search engine site is to outside cracks...

Nobody seemed interested when I posted about this...

http://blogoscoped.com/forum/79225.html

:-(