Iowa Cyclists Sidelined by Tacks in Tires

Could people really be this petty? Sure they could. Even the police think it was deliberate. I know some people (hopefully not too many) get really angry at bicyclists, which I’m still having a hard time understanding. Was this just a prank, or is there something more sinister behind it? The article says the tacks were found along the white lines, which seems too focused to be a random spilling of tacks. I hope this was just a random bit of nastiness, or some bozo’s idea of a joke.