Yeah, I am having the same issue. In doing some research on the MSDN blog, I've found that there really is no way to do this except for the modification of the .css file (which will hide it for ALL users including Admins). The only real way to do away with it at this point would be to write your own SSRS site (web page) with a custom security extension. This take time and dollars....

Unless anyone else knows otherwise??