This is a public forum so I suppose T could read it if he thought there was a reason? A concern of safety or something. I remember talking about this before in a similar thread.
http://forums.psychcentral.com/showthread.php?t=179233 Is it ethical for T's to read what a client posts online.
Again, I don't know T's that specifically go hunting online to read about their client. They have a lot more free time than I do, then.

Unless, it was a safety concern. Perhaps what was shared made him wonder about the nature of the forums, the content, etc, and he did go looking...
As always, anything online is public. Just as talked about in the "photos of T" thread. it's something to talk about.