Is it possible to disable Ctrl + F of find in page?

Question

I have a puzzle site and its an awful way of cheating. Its okay if only partially, but can it be done?
Something I had in mind was replacing the letters with images, but

Answer 1

Rather than disable the Find function, you could make it so that Find won't find the words! One way to do this would be to use the CSS content declaration to inject the words. Find won't find them:

.word-foobar:before {
    content: "Foobar";
}

You could quite easily write some Javascript to automatically generate all the necessary CSS rules for you, too.