POSING as Osama bin Laden, Nahum Nolasco rang Queensland Alumina Limited and told the person who took the call to jump off a bridge and kill themselves because a bomb he sent hadn't gone off.
Nolasco, 19, made the phone call in May while he was on bail for charges relating to marijuana that police found during a raid on his house two months earlier.
The Gladstone District Court heard he called because he was bored, at home, and he and a friend decided to make the threats.
Barrister Bill McMillan said his client, who pleaded guilty, was acting immaturely when he randomly dialled the number and told a QAL staff member a C4 package was delivered "to your place" and it was supposed to have gone off.
"Osama was dead for three years… (It was) a total and utter example of an act of immaturity," Mr McMillan said.
Before delivering his sentence, Judge Greg Koppenol chastised Nolasco for his stupidity.
"If you are bored, put on your joggers and go for a run, but don't ring up random people and tell them there is a bomb in their house," he said.
Judge Koppenol fined Nolasco $500 for the drugs charges and ordered two years' probation for the hoax.
"You have to make your mother proud of you," the judge said.
No conviction was recorded against Nolasco.