I wasn’t allowed to tell anyone that my flatmate isn’t allowed to work for another company in their industry for twelve months after they leave their current job.
The company is owned by a foreign national and their hiring documents were full of weird, improper regulations, including any residents of the house not revealing any of the NDA that my flatmate signed, so while I didn’t sign anything, I was technically(impractically and I can’t imagine legally) forbidden, according to a clownish NDA, from discussing all sorts of things.