Sounds like he just turned down a rather nice job offer, and burned his bridges by being publicly disgruntled about it.
So mostly likely he didn't want to work for them anyway and was very unhappy about the implicit threats related to his tor exit-nodes.
There are lots of stories about people who in one way or another got in contact with the intelligence agencies and nothing really bad happened to them.
Of course, agreeing to secrecy and then spilling the beans is not recommended. But in this case the agents decided to tell him stuff without any kind of agreement.