When you do an interview, go home, two weeks later you get told that you made it to the 'second round' of interviews, you go again and you get interviewed again, and then complete silence. You email them, and you get nothing.
I know they don't have an obligation to respond, but it would be great of they spend 2 minutes sending an email "Sorry you were not successful at this stage good luck kthxbai" email and BCC all candidates they interviewed.
Or "sorry we have hire freeze". Anything really.
How hard can it be?