For obvious reasons he did not send me a PM asking to vouch for him 
Why would you think it's important a case to PM you?I think there is an attempt on his side to definitely try to utilise that account for a signature campaign. There were allegations of alt-accounts, some seem to have substance but that is here not there in the context of the plagiarism case.
If this is not a context of this plagiarism case then why are you creating unnecessary suspense?Let's get to the point, you expect users to PM you for any case they have. Two days ago I sent you a PM and I still have not received a response. If I am correct then DireWolfM14 said somewhere that you did not respond his PM too. What indication we should take from it?