If so, according to this post on Lockergnome, people can use Google to search for and find online devices that allow them to see everything that is being photocopied on your machine. From the article;
"You don't have to be a genius to do this," said Jason Hart, security director at Whitehat UK. "You can see what people are photocopying on your monitor. You just have to search for online devices on Google."
Follow the link on Lockergnome for the full article.