Ooh! Ooh! I know! Find the raunchiest French porn website with an innocuous name in French and name it that with ".com" rather than ".co.fr". I mean what is more innocuous than "Bookmark?" Click there too often, and I guarantee you that you 'll get a sharply worded memo from the IT dept.
That way, if you "accidentally" click on the .co.fr link, you can say you were looking for an inexpensive e-book that had something to do with work.