What is the most worrying about the revelation that Edward Snowden was the whistleblower, is that he is a relatively low level employee, especially in respects

What is the most worrying about the revelation that Edward Snowden was the whistleblower, is that he is a relatively low level employee, especially in respects to security clearances. The material he would be able to get his hands on is just the tip of the iceberg in regards to what the NSA does that we would be outraged over.