Maybe. I'm saying more that there really isn't a problem on the paper's end. The problem, if there exists one at all, is the reader ignoring words on the page

Maybe. I'm saying more that there really isn't a problem on the paper's end. The problem, if there exists one at all, is the reader ignoring words on the page of a publication that is expressly about transmitting words. That said, the Guardian already uses a completely different highlight colour for its Opinion section than it uses for its News section.