Your comment made me take some action about this:
Add:
Using a user CSS extension (such as Stylish) or in your user.css if your browser already supports it.
Here's the result:
This is only a crude CSS only solution I did in 2 mins (edit: 3 minutes), so this could be made better, it doesn't even take into account whether there's actually an image inside it or not. Of course this needs users to wrap the images in spoiler tag but I guess this could be pretty easily implemented by NeoGAF website itself. Actually you wouldn't even need the ::after content, but I added it for cases where img is the only thing inside the span tag so there's something clickable. (You could work around it by setting opacity and size...)