To avoid reinventing the wheel, I suggest looking at legal definitions of blackmail, as well as reading a couple of law research articles on the topic. Lawyers and judges had to deal with this issue for a very long time and they need to have criteria which produce a definite answer.
To avoid reinventing the wheel, I suggest looking at legal definitions of blackmail, as well as reading a couple of law research articles on the topic. Lawyers and judges had to deal with this issue for a very long time and they need to have criteria which produce a definite answer.