Felony blackmail threats against a presidential candidate are a little bigger than a mere marketing campaign.
Somebody went and hand delivered packages to office buildings, at the risk of leaving being identified due to residual DNA/fingerprints as well as possibly being captured on a surveilance camera. To do something that risky for a prank would be incredibly idiotic.
Then again people gave Pirate their money so I suppose anything's possible.
From the way the notes were written, the individual(s) involved don't seem like the brightest bulbs...
