Actually the rays in question are of the T or Terahertz variety located just before the start of microwaves. The technology, or at least its mainstream use is only at an infantile stage so little is known about the true risks involved. The TSA offers limited verified information, but suggests that the amount of radiation is less than that emitted by a typical cell phone.

Many have questioned the method with which that exposure quantity was measured; SAR (specific absorption rate) for example, and whether or not that particular measurement is appropriate for evaluating exposure over the entire surface of the body with regard to millimeter waves. The important thing to take away from this is that your health and safety could potentially be at risk.

Additionally, and for your own information; gamma radiation is far from harmless and can cause burns, cancer, and cell mutation.

Sorry to dispute your statement, but nothing angers me more than misinformation.