Nothing to joke about or "play" at.
Back when Johnson was President (IIRC Johnson), some guy in a bar in Texas said he was so pissed at Johnson he would walk to Washington backwards just to kick his ass.
Guess what... someone called the Secret Service to report the threat... and guess who got a visit from the Secret Service.
State prisoners who did not like the state joint they were housed at, and who had LONG state sentences, would write a threatening letter to the President. They wanted to be charged in federal court so they would do their time or at least part of their time in a federal prison. It worked... at least until the federal judges figured out they were manipulating the federal system. SO... the federal judges would sentence them to do their federal time and designate to serve it in the state prison where they were currently housed. Guess what... the threatening letters stopped!