Of course the more open a mgt is with info the more the questioning can niggle away.
Certainly the more data given out the more MB 'chatter' - and most of the 'chatter' will be about stuff that is interesting: stuff missing, stuff that doesn't seem to make sense, ... - 'negatives' in your parlance.
But you leave an implication that the company would be better off not being so open - and I will point out that:
a) The 'chatter' doesn't mean much to stock price no matter how useful to us retail. Only once or twice have I seen an analyst appear to pick up on MB chatter - and even then I don't know it wasn't parallel thoughts.
b) The analysts can devestate almost any company since all they need for a negative spin is one or two factoids. You give a motivated short 10 factoids and he can find 2 that he can spin strongly to his or her advantage. Hiding data doesn't help with this problem.
Does providing transparency help the company? - in the short run, probably not. But in the long run I'd bet it builds trust with WS which is worth a premium. Honest analysts don't like to recommend a company and then be burned with a surprise hidden factoid.