Currently there is a crazy question on one of the list-serv, if students use Google Docs... how can you make sure they are doing the typing of their papers.
I think one of my middle school teachers had this question back in the 90's and didn't accept student-typed data of any kind. It had to be handwrittien. This is a resource sent in reply.....
I say start the work in class. You can always check the history of typing...
~~GB