As I understand from what EZ and Chrimson white have said over and over and over and over and over and over and over and over again, Rep comments are not PMs. The have public consequence.
A PM is PERSONAL between the parties. Publishing the title is very often publishing the entire contents. It is in my case. You can publish no part of the PM.
the only exception is threats and other felonious nastiness.
Every single mod who has made comment on the subject has been painfully direct and as obscure as clear glass. The only room I can see for confusion is deliberate
Check the rules. Board rules apply to PMs. You can report a PM same as you can a post. However, PMs cannot be posted on the board. That includes the title. It IS part and parcel to the PM.
I think that rule is excellent...because it prevents people from posting things that other members do not want the general public to read.
Very, very good rule.