Be prepared and watch the mouth.
DHS has already rolled out the Nationwide Suspicious Activity Reporting (SAR) Initiative program. Under this program:
"This initiative provides law enforcement with another tool to help prevent terrorism and other related criminal activity by establishing a national capacity for gathering, documenting, processing, analyzing, and sharing SAR information. Remember, you can report suspicious activity anonymously"---DHS Website
Indeed, watch the mouth. And everyday words will have important meaning, and leave no trail.