Opera allows you to shift between "show all images | show only already loaded images | show no images".
The middle option allows you to right click and load images you want to see, and it retains those images throughout the rest of your session. Thus, you could right click on KitanaVorr's avatar to show it, and not see any other images on the site.
Even better, you could load the main message board page for ENWorld with images ON, then switch to pre-loaded only, and it will keep all the important buttons.