SA Footy

I see on Big Footy that two people were sent Port Adelaide membership brochures and sign up forms. One member jokingly remarked that they were both West members and old Doug is selling info to the power. It's got me interested though - just how exactly is Port getting people's details?

Have you gotten sent this crap? If so, which club (AFL/SANFL) are you a member of?

I only got stuff from the Crows and Port when I used to be a SANFL member, haven't had anything since and Ive been a member of North for years.
Surely SANFL clubs wouldn't onsell their members list? Would it be legal?
Having said that, I know a few years ago when a group I was with (Roosters Against Merger) were having a stoush with the board that we got access to the entire members list, ie names and addresses, the club was bound to give them to use if we asked but I remember they would only let us view them at the club. We were getting the details for a mail out and a possible challenge to the board at that stage but as the merger fell through we obviously didn't progress.