I'll start by answering the first part of your question. Very few people in the RCMP or any other organization are actually authorized to know the identity of the person who submits an access to information or privacy request. In that sense, we're not sure exactly who submits the request, but generally, based on my knowledge of it, I would say a high percentage comes from the media in terms of access to information.
On June 4th, 2015. See this statement in context.