I am thinking of doing the same; but my problem is, I'm in Sydney, and I find that it's generally very hard to even find 5 gift cards in a store. So what's the point of opening more Flybuys accounts?
Well, until recently, I walked into a regional Coles and there were so many, I was like a kid in a candy store. Unbelivable.
Maybe I should forget the supermarkets in Sydney, and just jump onto an intercity train on Wednesday nights ......
Why would you make it so obvious? Why not use a different phone and different e-mail and different address? Use work phone, use a different free e-mail, use a different address (say work address). It's called staying below the radar.