Bernie Sanders Grandstanding?

So apparently Bernie is angry that Bernake won't tell him who they're assisting:

http://uk.reuters.com/article/americasRegulatoryNes/idUKN0349765020090303

While this looks like grandstanding, this isn't the first time he's claimed that we need to be worried about "stigmatizing" banks that have taken the bailout money, etc.  That lack of transparency strikes me as somewhat concerning, although I doubt it's something we'd normally get access to.