Indonesia is cracking down on a viral pirate flag that is spreading as a symbol of political protest ahead of independence day.

The Jolly Roger skull and bones with a straw hat—from Japanese anime series “One Piece”—has been fluttering from a rising number of trucks, cars and homes.

Officials warn the “provocation”—seen by many as a protest against President Prabowo Subianto’s policies—should not fly alongside the country’s red-and-white flag.

The pirate banner was taken up by disgruntled truck drivers earlier this summer, but has recently snowballed into an online and real-life movement.

“I personally raised the One Piece flag because the red and white flag is too sacred to be raised in this corrupt country,” Khariq Anhar, a 24-year-old university student in Sumatra’s Riau province, t

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