How is weed at work the latest issue? There's been obvious stoned workers writing code since at least 1997. I've seen it at pre-IPO startsups (c2000), small regional businesses (c2003), banks (c2008), IaaS providers, Economic Research, Investment Managers.
Lest my username give it away...it's a litle more common and open in my current space. But new tech-keeps flooding into the reefer-space..."the green rush".