Dear Vox, let Me control Snap Shot spam
Snap Shots pop-ups, seen on Vox when you hover over external links, are the most annoying creation in the history of the Internet*.
Unfortunately, although you can disable them, Vox don't give the author any control to decide if they appear. There appears to be no "Stop polluting my blog with Snap Shot" option. You'll have to turn them off assuming you don't block or clear, cookies - which you should - which means they'll come back :-(
Turning off graphic previews on all sites
If you'd rather not see the graphics previews on any of the sites you visit, you can also disable Snap Shots on all sites. This can be set up from within any Snap Shot popup. Hover the gear on the top of the preview, and then select "disable" from the menu. There are options for disabling on All sites or just the current site. Note that this makes use of cookies, so if you clear your cookies, you'll need to reset this option
* That's an extremely polite description of what I really think of Snap Shit