Pirates once held Julius Caesar for ransom. After that, he tracked down and crucified every single one.

When travelling across the Aegean Sea, Caesar was kidnapped by pirates. As ransom, the pirates demanded twenty talents. Caesar laughed at them because they didn’t know who he was, and suggested they ask for fifty talents instead. He was held for 38 days during which time he wrote poems and speeches which he read aloud. 

Those who didn’t appreciate what he was saying he called “illiterate Barbarians.” Laughingly, Caesar threatened to kill them all. After his random came, he was set free. Immediately, he manned numerous vessels, sought after the pirates, and caught them almost immediately. They were all imprisoned and crucified. So if there’s anything to take away from this, it’s that nobody messes with Julius Caesar. Except Brutus, Cassius, and 58 other people. 

(Source)