Social media is a powerful tool that can be used for good, and which can easily turn to evil by our very own laziness to verify what we’re posting. [Source: PR Newswire]
In a nutshell, slowdown and verify the facts before re-posting and/or re-tweeting. I make an effort to always fact-check, and refuse to cosign on something (seen via social media) without feeling some level of certainty that the information isn't bogus. That's all.