Because the idea amused me, I decided to make a jQuery bookmarklet to add the word "fucking" to online texts. Bookmarklets (Buttons) are links you add to your browser's Bookmarks Toolbar.

Drag this link to your bookmarks and click to add a bit of colour to any page: Fuckinator

If you're using Internet Explorer or don't have a Bookmarks Toolbar, right-click on the button and click "Add to Favorites"