My goal is to save as much bandwidth as humanly possible, as bandwidth is fast but very limited.

I'm looking for a way to block all images... that much works in Opera. However, then they are really, truly blocked, and there is no way to see them! Sometimes I do wish to see an image though, and I remember some browser + add-on having a way to view specific images. Can't find anything like that on Opera though. Setting an exception is not a reasonable alternative, because out of 100 images on a site I may be interested in one or two, and only occasionally, but on all sorts of sites.

I don't understand why the feature wasn't implemented like that... a general block is pointless.