QF Boarding Passes left onboard

[Quickstatus]

On the weekend I patronised 4 QF flights and in the process harvested 6 QF boarding passes from the seat pocket
I kept and later destroyed then
Is it possible to hack an QF FF account 4 digit pin?.
There have been stories of accounts being hacked when you have 2 of 3 pieces of required information. Not sure if it's true. An bank issued card also has 4 digit pins but there does not seem to be widespread hacking. I understand that after 3 attempts the FF account is locked

 

[serfty]

Need:

• QFF Number
• Surname

And any 3 of:

• Mother's maiden name
• Date of birth
• Postcode
• Date of joining

 

[andyhui01]

That's not hard if you start with a boarding pass with the FF number and Surname. The other 3 can be found if that person happens to have a fairly public social media profile. Find mom by looking at posts/siblings post, when people wish them happy birthday + high school graduation year and postcode by browsing their feed or looking at common location of posts.

Need:

• QFF Number
• Surname

And any 3 of:

• Mother's maiden name
• Date of birth
• Postcode
• Date of joining