You are so right, Lisa. In this day and age, things like that should be taken seriously because you never know when some idiot will actually make a bike into a pipe bomb.
During the months after the Columbine tragedy, my son was on the school bus heading to school and the previous night, he had watched the movie "Speed" with Keaneau Reeves and when he mimicked a line in the movie: "There's a bomb on the bus" to one of his friends, the bus driver brought him into the principal's office, the police were called and they had a long talk with him about saying things like that. He was scared and thought he was going to get arrested.