I'm sure they are - as to talking to the media and such.
But that doesn't mean they can't express their opinions or relate them to friends, family or as "unidentified sources" :o)
Opinions are one thing...and that is fine...but details of this sort go beyond that. Do not get me wrong, as I stated, I believe this is the case and agree with it. But if we have secret service agents going into this level of detail with their neighbors, they are proving by their own actions, IMHO, that they are a significant security risk themselves.