Facebook co-founders Sean Parker and Dustin Moskovitz have give $170,000 to campaigners for Proposition 19, which would make California the first state to legalise pot in the United States.
What makes this surprising is that Facebook banned pro-pot campaign adverts, while happy to show anti-drug adverts paid for by the government.
"What's interesting here is that [Parker] is a member of the generation that really gets it," Drug Policy Alliance spokesman Stephen Gutwillig told the Associated Press news agency.
"We think he's pivotal to the future of drug policy reform in the country," said Mr Gutwillig, whose organization will be the main beneficiary of Mr Parker's donation.
Derug reform is a tricky subject in this country but the technology industry has always had some involvement in the industry. Steve Jobs famously said that Bill Gates would be a 'broader guy' if he'd dropped acid or gone to an ashram.
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