You would see catepillars in your grow and have lot's of other damage from them eating the leaves. Looks man made *cough troll *cough
Curious why you think anyone would come on here an post a pic of "whiteout" on a leaf just for "troll" shits and giggles? Come on, have some faith in people. Help a fellow grower out.
While his pic isn't nearly as good as yours (very different camera lenses, I'm sure), you can definitely see a finger-print like pattern on his photo, if yours were blurry, it would look similar. Given that his camera lens is obviously not as good as the one used in your pic, it is easy to recognize that his pic is most definitely not whiteout. Why would anyone lie about whiteout vs caterpillars?
Not everyone is looking to get over on somebody else. Don't be such a pessimist. Would you like some of my wine, you'll notice my glass is half full