I am new to the board as well and though that comment was over the top, I have to admit my first thoughts were, "ewwww creepy stalker guy!"
It is one thing to research a place and its history but ..well... I guess its just me but I find stalking a house a little over the top
Ok I might be tempted to have a quick drive by of the place and snap a photo from my car while doing so... but to get out of the car and take photos of the house and the guy living there? Nope that crosses the Miss Manner's line.
I guess if I were that guy I would have mooned you and said, "Don't you know, ghost only come out during a full moon!"