Buying a cup of coffee is getting risky for introverts. Last month, McDonald's asked random customers to hug strangers to get their orders for free. Now, Starbucks baristas are engaging customers in conversations about race.

It's the Seattle-based chain's latest effort to solve the world's ills.

However well-intentioned, it seems destined for death by tweet, as social media responded with gleeful derision: "Some of my friends are black coffee" and "Despite our differences, left or right, black or white, can we agree this Starbucks race talk idea is really stupid?"

The main problem is that eliminating bias is too big an order for small talk.

Starbucks unveiled the program with full-page ads in the New York Times and USA Today that asked "Shall we overcome?" on a stark black background. "We at Starbucks should be willing to talk about these issues in America, " CEO Howard Schultz said.

Starbucks employees have been talking about race since December, when Schultz launched forums on the subject at stores around the country. At one, an African-American employee poignantly likened racism to humidity: "You can't see it, but you feel it."

In 2013, after Trayvon Martin was shot in Florida, President Obama said people are "a little bit more honest" when talking about race within their families, churches and workplaces.

Internal forums may be useful within Starbucks. But conversations about what's been called America's birth defect — racism — are too important to have awkwardly while waiting for a cuppa joe.

FROM AN EDITORIAL IN THE PITTSBURGH POST-GAZETTE