I just had the most amazing experience and needed to share it with the world:
I am flying to Spain tomorrow on Delta. I have a KTN number with the #TSA for Precheck on domestic flights. I checked in to my flight, and was not given Precheck for my flight from San Francisco to JFK (after which I go to Madrid).
I sent a tweet to the TSA asking if I didn't get the Precheck because I was flying internationally (I was asking a question about the program, not complaining). I figured if it was a domestic flight, they would have given me Precheck, but because I then traveled international, it might not work that way because I don't have Global Entry (which is like Precheck for international travel).
The TSA responds to my tweet within an hour, and asks for my KTN and Confirmation Numbers so they could investigate. I send them a direct message with my name, KTN, and confirmation number. Three hours later the send me this direct message back:
"Yevgeniy, sorry for the delay in our response. The reason you didn’t get TSA Precheck is because a KTN was not submitted with your reservation. We have worked with Delta and they have updated your reservation. You should now get TSA Precheck status on your boarding pass, if you are traveling domestically."
I thank them and go to Delta's website, where they ask me to check in again. I do, and sure enough, I have Precheck for my flights.
A government entity responded to a tweet. Did research. Worked with an airline. Solved a problem (which I wasn't really all that adamant about them solving). And notified me about the change with a pleasant message. All this in under 3 hours, and using Twitter.
The future is here.