> I Don't think we should be too hard on Baidu, considering they are attempting to improve their algorithm for the interest of humanity

They are not improving the algorithm for the interest of humanity. They submitted and obtained test results much more frequently than allowed. With that information, they can tune parameters to more closely fit the test data.

Basically it is like scoring higher on an exam where some of the questions have been leaked. It does not suggest you now have a better understanding of the subject.