Trust me, its not just my imagination... it is possible!
Have you seen how dangerous EMP can be? If you watch 24 you'd know what the impacts can be as this was a bit of a storyline inside the main plot but in a much smaller scale.
Trust me, even though they don't damage people in far proximetry, it'd sure kill anything electronic. You never know what dangers this sort of thing could impose on the whole entire world...everyone with no power, no food because they cant run anything, no banks, so no money, no computers! *breathes in*, everything you can possibly mention that you like would be wiped out... freaky but totally totally plausable...