Search Twitter for #4twenty or #Happy420, on the other hand, and you'll be able to see everyone who's tweeted about Friday's unofficial holiday. (For the uninitiated it involves celebrating what Greg Focker might call "puffing the magic dragon").
Social media and mobile tech has often been helpful to marijuana smokers. Cannabis News Pro app for $2.99 connects tokers with marijuana news and helps them find the local -- and legal -- hook-up. There are numerous other apps where growers can get advice and help.
Nevertheless, Twitter has been known to step in on controversial issues. In January, the company announced it would censor tweets in accordance with respective governments' laws of countries where it is used.
But not everyone on Twitter was jazzed about the celebration. The hashtag #NO420 was also a hot topic of conversation.
Editor's Note: Mashable does not condone recreational marijuana use where it is prohibited by law.