I&#x27;m sad that wifi-blocking wallpaper seems to have never taken off:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Stealth_wallpaper" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Stealth_wallpaper</a>