Earlier quoted context omitted.
Even Matt's allegation is softened by "I believe" here: there appears to be nothing that conclusively indicates Bing is solely targeting Google. For example, the observed behaviour could be a side-effect of a generic algorithm to extract and associate search queries with a user's click stream, which is only a minor variant of what Google itself does with its own toolbar. If the case described above were true, then al…
Associating search queries and click stream behaviour is fine if it's your own search engine. Doing it for someone else's search engine isn't (regardless of who's doing it).
Why? This seems like a great idea.