Apologies,I generally frequent this site at lower brain functioning hours, so again, I apologize if the title is a little funky, or this post for that matter.
But, I figure, since I do it, there might be a few others who do as well, some times, I go to collections, or an author, or just the post view, and find the 'need' (isn't the word I'm looking for but close enough) to turn off by blacklist, or portions of it.
And, I thought it might be nice, if you could 'see' which images were part of your blacklist, besides trying to toggle it off and on, or other tedious methods.
boiling that down:
Feature: see images that would be blocked by blacklist if it was on.
Why I think it would be useful: It would honestly effect a subset minority in a positive way, but otherwise wouldn't, I only know my self though, and I'm not all that much of a socialite on this site, so I don't know how many people would actually like this.
What would change: depending on implementation, It can very, but what I would recommend seeing as you have borders for images already, is something closely associated with them, maybe a little corner of the thumbnail is covered with something.
