When I was in college at MTU, a guy who was butt-wasted at the bar took a dare and threatened Reagan from the pay phone outside. He lasted less than two weeks, and the judge didn't have a sense of humor.
Same school several years later (I was working on my MSCE); the secret service shows up and collars a kid for e-mailing a death threat to Clinton. Turns out the kid got up and left his work station without signing off of his account. He went through hell before he was let go, and the slime that sat down at his terminal and sent the message was never caught.
Lesson? Don't fork with the president, no matter who the president is. And always log off.
"Don't fork with the president....."
Unfortunately that inmate did, and the "judge" sided in this criminal's favor.