If you have absolutely nothing productive to say about a blog post, I think a good comment to make is "This is an example of a first world problem."
Essentially, you are saying that the content of the post is trite and you have nothing to add.
Here's a newsflash: If you are sitting at home reading and commenting on a cartoon blog, you do not have any third world problems. You are not worried about famine or drought or shelter. ALL your problems are first world problems too. If your child is failing all his classes at school: first world problem. If your toilet is flooded and there's literally shit all over your floor: first world problem. Even if you have cancer and are considering chemotherapy: first world problem.
So what you should really write is, "This is an example of a first world problem, much like every single problem in my life."