An Anonymous Coward writes:
A gunman fired upon thousands of people attending a music festival on the Las Vegas Strip Sunday night, in a brutal attack that is blamed for at least 58 deaths, police say. In the mass shooting and panic that ensued, 515 people were injured. At least one of the dead is an off-duty police officer who was attending the concert.
Editorializing: Interesting how media always emphasize ISLAMIC terrorists, but downplay domestic terrorism as psychologically disturbed individual lone-wolfs.
They still know who you are.
Based upon the reaction to and the continuing saga of Ed Snowden, and not even touching on the gaping holes in your assertions (IMSI and RFID OHNOEZ!) you appear to be vastly overestimating the capabilities of US government agents.