Such headshot icons range from signifying "upload your weeble-like headshot" to "upload your Tom Selleck headshot," but it only takes a glance to know what is being expressed by the icon. In part, I think, the message is conveyed by the vacancy of gray in some of the images, the anonymous facelessness in all of them, and in the most obvious samples the overwritten "Photo Coming Soon!" text.
We've come to be quite icon literate, I guess: your cart icons (), shortcut icons (), and even silly ones like and .
The shortcut icon is as close as we've come to reanimating cartouche culture, whereas the little doo-dad icons (Photo coming soon!) seem more about conveying a commonplace through a vernacular visual vocabulary that has plenty of elasticity built into it.