Actually, I'm very sorry about this because he is my friend as well.
So, I have personally given him some of my suggestions... very nice and concrete suggestions... I'm hoping him to consider... at least I hope he won't do it again... pls remember that I didn't ban him and I didn't consider the promotion of other forum a very very serious instance, though I really don't recommend this. But he clearly break it... also, I see him posting some thing that are 單打 on other member... so, I notice about that and I have to balance the goods and bads of other member, so I made this decision.
I want to repeat, I highly appreciate his past doings in this forum. However, I have talked to him about my thinking of management and personal problem with other member... I have already PM with him to talk a lot and a lot about how to deal with some other member... however, I got a lot of evidence that the peace cannot be maintained... so I have to make this very very difficult decision.
I'm sorry. Though I have made my sincere personal (private) resolutions for him... the point here is: whether he accept or not.