Redditor on what this could possibly mean:

She's sending a signal to anyone who's thinking about publicly addressing pizzagate. And she's also sending a signal to anyone who is thinking about investigating and/or prosecuting.

The pedos are well connected in the intelligence community, and the intelligence community WILL intercept / examine all your communications and blackmail you.

https://www.reddit.com/r/conspiracy/comments/5tyhcu/hillary_clinton_literally_just_tweeted_about/ddq1iar/