If I had a really, really mean streak, I'd show up at his Kingdom Hall, early. I'd have a nice chat with a couple of the sisters about this dear brother and let them know the contents of that e-mail. Assure the ladies that I am not interested in joining but they all seem to be very nice people. I just wanted to see where he spent so much of his time.
Don't give anyone my phone number or last name.
Wait until he arrives, shake the hands with a few elders, chatting intimately, and leave. (You can spot the elders. They will be shaking hands at the doors, wandering back and forth with an air of importance).