We're not even a quarter of the way through 2013, but we've already seen enough high profile social media fails to fill a book. From The Onion's infamous c-word tweet to HMV's live tweeting of layoffs and NASCAR deleting an unflattering video off YouTube (seriously? This is the INTERNET), Business Insider has compiled a list of some of the more egregious.
Personally, I'd add the fake MTV Twitter hack (in which it tried to cash in on the Burger King/Anonymous takeover) and locally, the NBR tweeting out 'Duncan Garner dead' with a link to a paywalled story, which turned out to be a comment piece and not in fact breaking news of any kind.
Remember, social media managers: