I worked for a company in field A. They were bought by a PE firm and we were all given three days or out to sign an NDA. I signed. FF a short period of time and

I worked for a company in field A. They were bought by a PE firm and we were all given three days or out to sign an NDA. I signed. FF a short period of time and I'm negotiating employment at a firm that did work in field B. They had a subsidiary someplace else that happened to do similar work in field A. New company had to have their lawyers draft a letter saying I was not going to work with the subsidiary for the remainder of my NDA before I was officially hired. New company could easily have just walked away from the deal costing us all a good deal of time. Luckily they really wanted to hire me and didn't. NDAs are toxic. Don't encourage anyone to sign one.