Really, "that time the FBI tried to blackmail Martin Luther King into committing suicide" is too far back to count as an example of TLA overreach? We only know about that whole escapade because radicals physically broke into an FBI office and stole evidence of it, this isn't the kind of thing the government willingly admits to us. The CIA destroyed most of the MK-ULTRA documents when they realised Congress was getting ready to ask for them, but we still know that they were drugging unconsenting US citizens with LSD and secretly recording them having sex with hookers (they called it "Operation Midnight Climax") just to see what would happen, but I guess that's old news, too, or maybe it just isn't politcial enough to care about. We probably won't know that they killed Michael Hastings for another couple decades, and then that will be old news, too, so who cares?