Is Elsie the new Banksy?

Someone has written the word "fuck" on the wall of the workroom. It is  penciled in very small, very neat handwriting. The logical part of my brain says that it must have been one of the Duke of Edinburgh work experience kids that come in for an hour after school on a Wednesday. (perhaps I was a little bit patronising when I showed them how to turn the Hoover on...). Secretly I hope that it was Elsie...