There were two examples in the news recently of people who were arrested for expressing that sentiment.
In Westmoreland County, a man whose legs have been amputated and whose lawyer says he has limited use of his arms is charged with threatening to punch and strangle a Common Pleas judge in a child support case. Despite the handicaps, officials believe that the volatile nature of domestic court proceedings made the threat credible.
In Carnegie, a man threatened to kill elementary school employees after his kindergarten-age son got on a school bus by mistake. The threat was especially inappropriate because the error was discovered almost immediately and the bus returned the child to the school.
In both cases, the men would have been better off just biting their tongues.