I haven't seen the details of this new policy, but I'm sure you'll be required to fill out a form which says to list all social media accounts that are under your control, and at the bottom of the form will be a space to sign your name with the note (standard on federal forms) that it is an offense under section whatever of the United States Code to knowingly provide false information on the form punishable by a fine of not more than $250,000 and a prison sentence of not more than five years. So, you're taking a big risk. If, at any future time, there's an investigation which reveals the existence of undisclosed social media accounts which existed at the time you filled in the form, you are a felon and could be imprisoned.