Things that apparently need explaining

When visiting an office in central London you will be asked to sign in or you will not be allowed to enter the premises. This is the case at my office. Staff sign in one book with their name, time in and who they are visiting. Visitors who are not members of staff sign a slip of paper that is then torn out of a book and worn in a little plastic sleeve that they can attach to themselves with a springy clip.

At least once a day a group of people will come in - usually about three or four people - and the first person will ask 'Do we each need to do one of these?' and then sigh when I nod or say 'Yes please !' in an overly cheery voice that makes most people grimace for a split second.

I don't think it's a difficult concept the idea of one badge per person...is it?