I think that if this person is making the threats you say he is, you should name him. My reason for this is:
1. All other members will be aware if they ever deal with said person.
2. The mods can have a look at the situation and make a decision as to how to deal with the member and/or yourself.
3. A threat whether it is made face to face, over the phone, in the written word be it Text, PM, Email or hand written letter is a threat.
4. These PM.s should be kept and if you can't sort it out between each other I believe that due to the subject content of this Forum and the fact tha