Scientific advertising and marketing is actually its own small specialized field, and is done by people with a solid technical background (we produce a whole lot of advanced STEM degrees, there's plenty of folks available with this sort of background).
So I just want to be crystal, crystal clear here: there's no way in hell anyone involved in this pipeline should have any doubt about as to whether drawing on gel photographs in photoshop and/or copying and pasting blots is fraud. "Proofer" or not.