T’s wife and my mother’s family share a very similar last name (pronounced the same but spelled differently). When I talked about my maternal great grandmother he said that was the same as his wife’s last name and, without thinking, I said yes, but they spell it differently. Oh the look of panic (T did not know me well yet). T’s wife’s full name is on his professional web page. It isn’t obvious but it is there, in red print no less. I explained this which I am sure he checked after session... I too am an information gatherer. Sometimes intentional sometimes not.
Down the road, once T knew me, I brought this back up. I was shocked to discover not all clients are information gatherers! He said, truthfully, most of his clients don’t give him a second thought between sessions! Having now encountered some of his other clients I totally believe this! But... he has since opened up access to a world of information to me (OK, I had already found it but never discussed it... but then he told me where it was so...).
Long story short, good T’s don’t stress more than necessary about such things, not all clients care, and most T’s have ways to deal with it if someone uses the information inappropriately.
If you HAVE to bring it up I would do it “backwards”... something like OMG, one of my co workers just showed me this thing on the internet... and see how T responds.