walkman - 3:44 pm on Oct 5, 2011 (gmt 0)
Bing does is that way, but Panda is a sitewide penalty when certain criteria is reached, so the entire site suffers. I know it first hand. Maybe if sections are divided clearly, it's different. maybe.
Oftentimes mis-matched traffic is the result of an ambiguous search term. In any case, a high bounce rate for one term logically shouldn't affect your rankings and traffic for other terms.
This, in the end show that way too much power is in the hand of one search engine.