E) the internets knows I have guns
F) VISA knows I have guns and where I live.
G) the long gun registry knows I have guns and where I live.
H) anyone who has access to the registry, authorized or not, knows I have guns and where I live. If they cared, they would also know exactly what types and brands I own, so if they are say a gangster who's corrupted someone with access to the system, they have a nice shopping list for B&E's.
I) deep marketing research of demographics could highlight with high probability that I'm a gun owner, how I vote, what kind of vehicle I drive, what my family looks like and what kind of music I probably listen to.
J) my gun club knows I have guns, and where I live.
K) if my ISP ever decides to lookup my traffic, then they would know I have an interest in firearms, probably own a few, and know where I live.
L) CSIS or CSE would know...because it's their job to know.
M) Google would know, based on my searches, and would know where I lived, and could probably zoom in using the Google-Satellite and watch me typing this right now! (no, I know Google doesn't own any satellites of it's own...they just use the NRO satellites!)
Just off the top of my head...but I do find it confusing when the firearms ownership manual printed by the Queen's printers states firmly that I should not tell anyone about me owning any...um, ok, little late for that kind of privacy!
The one that has me most concerned is that of a gang getting my address and knowing what's inside...then waiting until I'm at work to come and steal them.