I can only speculate, but clearly the pictures and the material for the websites are very important for people. If it is a big operation, obviously these groups do gather substantial sums, so I can only assume that there is a great deal of interest in observing the hunt. They have a right to be there under the Charter of Rights and Freedoms, and they exercise that right in order to observe the hunt, take photographs, and get material for their websites and their pamphlets, etc.
On June 15th, 2006. See this statement in context.