I'm still trying to come to terms with the whole OWS movement myself, but I think the part they're complaining about in regard to what the guy in the picture wrote is that they as a group grew up thinking they
had to go into debt forever in order to get an education, and that
now they're on the level with the guy who wrote that paper and see that they could have done it differently. I think their complaint is that society pushed them in the wrong direction from a young impressionable age, before they had a choice in the matter, and now they're pissed off at where they're at.
If it was just a few, it would kind of be just people blaming others for their own problems, but when you have a sizable part of the population angry about the same thing, all kinds of stuff happens.