It's good advice not to kick the 800 pound gorilla. Google isn't happy with Symantec and the way it has not enforced validation of people registering security certificates from them. Google has warned Symantec that it would invoke penalties for being too lax and even borderline negligent in issuing its digital certificates. Chrome will gradually reject websites that use certificates issued by Symantec. Even websites that derive their key chain from Symantec's root will face the same rejections. Approximately 60% of Internet users use the Chrome browser so this action is a big deal. If your website(s) or server(s) are utilizing a Symantec certificate, I would consider an alternate provider.
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Digital Forensics/Information Security/Information Technology