Interesting question?

See picture for the question?

Search engine terms.

Probably the same as what happens with all other deleted content on the net. It remains in the “google” cache (or whatever search engine for that matter) for a to me ‘undefined’ amount of time.

Test yourself to find out! Search for some picture and use the view cache at google to access the content. Because what often happens is that some page isn’t available anymore and/or that you aren’t a registered user on said site/forum.

Therefore view page as resolved by google @dd-mm-yyyy, as they crawled the web at that time, and you’ll get to see what you were or weren’t looking for? Depending on the feedback that is!

Robots.txt anyone plus additional safeguards like .htaccess files and the likes?