That is what I'm doing with gossip. It will show an error message in the place of where the image would have been, as well as a link so that you can view it in a browser if you want to.  It won't show the altered image. 

 Yes, that's the correct behavoir! I run gossip on  nixos. Had to create my own nix file for it, as the one in thr repo didn't wotk for me. Not an expert so I didn't send a patch...

Great app btw! Thanx!!!