I get that you consider this behavior to be counterproductive, but please avoid the term "morons," as that has been used as an offensive term to describe individuals with differing intellectual abilities, also once described as "mental retardation." As demonstrated in this article, you have plenty of synonyms to work with that don't connect despicable behavior with mental abilities. Some vandals may have intellectual impairments, but certainly not all people with differing intellectual abilities are bad actors.