Howard County Police say Bruce Lawrence May earned himself two speed camera tickets recently. May apparently was not happy with the tickets — who is? — but he allegedly went a few steps further than simply cursing the machines very loudly.

Police arrested May on Tuesday night for allegedly retaliating by using a slingshot to sling glass marbles at a speed camera van.

Clank. Clank.

The marbles were allegedly fired from May’s Chrysler minivan at the speed camera van around 5 p.m. near Manor Woods Elementary School. The speed camera van driver alerted police, who arrested May, 50, and charged him with second-degree assault, destruction of property and reckless endangerment. He was released after posting a $3,000 bond.

This has been a particularly cruel month of anger toward speed cameras in the county, the department said on its Facebook page:

On June 13, someone threw an unknown object at a Howard County speed camera van on Route 99 near Waverly Elementary School in Ellicott City, breaking the back window. The day before, on June 12, someone threw rocks through the window of a State Highway Administration speed camera van on U.S. 29 near Route 103, striking the operator and damaging the equipment and vehicle.

“We are taking these incidents very seriously,” police chief William McMahon said in a statement. “Even if you are not a supporter of the speed camera program, lashing out and endangering individual employees is not an appropriate way to express your opinion. We will continue to investigate these incidents and will charge suspects who are engaged in this activity to the fullest extent of the law.”