> If someone is commenting on the article without reading

Yeah, I hear you. I note in my case, I read the article and posted about the clarifying sentence.

I did find it funny that so many people were in an animated discussion about the interpretation of the headline.

  gremlinsinc: "how does it know there isn't one further out past the observable universe?"
  doctoboggan: "the title is a little unclear, but I read it as the most distant known supermassive black hole"
  dotnet00: "I feel like contextually it's pretty obvious "

Obviously without reading the first sentence of the article.