I'm more worried about the fact you seem to be of the opinion that editing someone else's art, although art is questionable in this case, is ok.
Frankly, you seem to be trying to find any excuse to break out the mod-hammer. Well that's alright, we all know that strict policing helps the creative spirit to thriv... oh no wait.
All that has been modded is the file size to what we want on the board, to which you seem to be dragging in the Illuminati with regards to people's art. It's not hard to comply with the FAQ to keep this place moving smoothly, and even made easier when a mod helps out doing the optimisation for you. If you have issues with any of that then simply shrug fella.
(JahledThree shades of black,
Mon 23 Apr 2012, 20:46,
archived)
File size has changed, yeah, and image dimensions, and image quality, and colour depth.
That changes the way the image is seen and percieved, and that's not a mod's job. Sure, link them if they're fuck off massive or porn, but don't fuck with the art.