I'd argue it's actually an IRL manifestation of some of the worst stuff that has been going on all over the web for a long time. As such, the content is really any different, but it's a lot more noticeable.
That's a pretty good point. A lot of people love to get online and join into 'divisive' stuff by way of anonymity. That's not the Weev style. He is, in my estimation, a textbook example of what was meant by the phrase "I disapprove of what you say, but I will defend to the death your right to say it" in the context of the US. The guy certainly knows how to test the bounds of what is or is not criminal, according to the current laws and whatnot.
I totally agree, the only new thing here is that it involves paper, rather than online comment boxes and web page defacing and such. The paper aspect seems to get stronger reactions, since it sounds like people are assuming that something coming out of a printer must be from a local person. Or maybe it's just that paper is more tangible.