Hello,
You can send a private message to any CSRnation member as long as they are your friend.
So, first you have to send a friend request to that person and as soon as they accept you will be able to send a private message.
till then you can leave them a comment on their page.
hope this answered you question

Laura, I hope you weren't referring to me when you said in my blog about his/her destroying reputation by an offensive post.