http://digg.com/world_news/Boston_police_blow_up_traffic_counter_chained_to_lightpost
I don't normally link to Digg but the direct article, but if you look at the artical it doesn't seem to indicate the stupidity.
If you are a motorist, I am sure at one time or another you have seen own of those counters.
I blame CARTOON NETWORK
Hmm, I think the terrorists are winning...