I ALWAYS make sure I tear up completely any private things like this, credit card bills, even receipts where I have paid by card, so to a certain extent it is the fault of the pax, but on the other hand I dont account for journalists snooping around like rats in the garbage. In fact it is jounalists who are half the problem and the cause of most "security alerts" at airports.
Having said that, on some airlines, FR comes to mind, when I type my first and surname into the booking page my entire address comes up and then it asks "is this the correct address?" which I am not too keen on.
XSB