Yes.
The most troublesome thing with an EMP-type disaster is the nature of our food system and how we, as consumers, receive our food on a daily basis. The "Just In Time" method of inventory/delivery was popularized by Wal-Mart. It basically allows Wal-Mart (and now most other large grocers/retailers) to decrease the costs associated with inefficient inventory decisions and handling by getting their products "just in time" to sell. Essentially, when you go to the grocery store to buy a non-canned food item, chances are it was delivered fairly recently.
Now imagine that an Electro-Magnetic Pulse event would take out ANY electrical systems not magnetically shielded (aka, wrapped in metallic substance) would be rendered disabled. Not only would this take out the electric power grid (a technology that is completely outdated), but it would also disable any vehicles with electric ignitions, steering systems, drive-by-wire systems, etc. In other words, we'd have no power for our freezers/storage, and no vehicles (other than some older models without electric ignition) to transport the food we did have.
Grocery stores would go empty. Societal unrest would depend heavily upon the area in which you currently reside (given the fact that most people would be unable to move locations quickly due to the lack of transportation).
I've only recently begun to really think long and hard (insert joke here) about how to at least have some sort of "preparation" for this type of scenario. Here's the best thing I can think of. I have a metal-lined fire-safe that I've had since I was a kid. Into that goes a small radio, an assortment of as many batteries as I can, and a compass. I'll be buying about $200 or so of canned food from Aldi's (best supermarket in the world) and I've already started buying one 3-gallon plastic jug of water with each trip I take to the supermarket. My goal would be to have enough food/water to last my wife/unborn daughter and I for 3/4 weeks.
I also plan on buying a firearm or two before the end of the year and taking a hand-gun training course. Our plan would be, depending on the level of unrest and estimated time until electric power can be restored, to ride out the event at our house. In the event we'd have to leave, my family has a "meeting spot"(my dad is a bit of a conspiracy theorist, but def not someone that believes everything and/or is a whacko) where my brother (in San Francisco), my sister (in Denver), and myself (in Raleigh) would meet up with them (near Oberlin, Oh). The idea is that if all communications are cut off, we could try to meet/gather in one spot, if possible.
Do I think there is some sort of impending doomsday in our lifetimes? Probably not. Although, I do have to admit that it feels like human-kind is reaching some sort of crossroads. I mean, shit... look at the chart of world population over history:
Does anyone expect that J-Curve to be sustainable? I sure as hell don't. At some point, you have to believe that, considering finite resources and "all other things being equal"... (whereas equal means the limitations of our current resources/planet) the human population will "correct itself". I think our only possibility for our saving grace would be the Technological Singularity... The moment in time when the exponential growth of technology leads humankind to learn more in one second than in all other years of human history combined. The Singularity would be the only thing to change "all other things being equal" in my statement above. If we could grow our technological capabilities fast enough, we may no longer be constrained by the limits of the earth, our own biology, and possibly even time. Until then, I expect "something" to happen to correct the world population... whether it be an EMP disaster, war, a "super-disease", an asteroid, or a polar shift.
In other words... who the hell knows whats going to happen?!