Fuck HR. Never relax around them. Never tell them what you think. Everything is going well, say nothing else. If they start to interfere, wage total war. Document and e-mail every agreement. Record every conversation. Refute every accusation. Do not give an inch. Pretend to be nice to them. Be popular with your leadership and colleagues to weaken their position. If you're American, get them to fuck up and sue. End of public service announcement.