The Navy’s operational security program is making a big push for sailors and and their families to lock down their social media presence lately, in the wake of a list of service members posted to an Islamic State group supporter’s website last month. Though no imminent threats have been made against sailors, officials urged personnel to tighten the privacy settings on their social media accounts by making them private or unsearchable, and removing any military affiliation from their accounts. But the internet is a labyrinth of accessible personal information and confusing privacy settings, so the experts at Navy Information Operations…