On how to deal with journalists who do the "Do you know who I am?" and are obviously not well-known enough. Recently, the proprietor of a popular eatery in South Delhi was confronted by a big, aggressive woman who asked for something which seemed implausible. We do not know what exactly, but what followed was rather interesting, when challenged by the "Do you know who I am?" line and various threats, the gentleman sourced the number of her (incidentally former, since the woman was 'let go' recently) boss and made a call/sent a text and did that with the #2 boss as well.
One must applaud this guy for doing what he did! If you piss someone off (usually this is because something - a meeting or an exclusive was promised and there were 'delivery issues') then yes, you (PR chap, yada yada) get a shellacking. But when an unusual favour is asked, then well, you have all the right in the world to escalte the issue.