There has to be a difference. You shouldn't become such an experienced person at X or Y that it's actually illegal for you to change jobs now. If you are in a p

There has to be a difference. You shouldn't become such an experienced person at X or Y that it's actually illegal for you to change jobs now. If you are in a particular field you should be valuable to stay in that field, and changing jobs is a right. People need to ability to change jobs as much as they like and there should be no blacklist.