I think if airlines/hotels etc are sending surveys they should sent them SEPARATELY FROM OTHER FREQUENT FLYER MATERIAL.
What happened to the mightly Quiet Lion (another cat-related member YEAH!) could happen to any of us. In our rush to get through tons of mail, we could lose valuable information.
When I first joined U-A eons ago, I threw out most of the pack. Then Yaz knocked down the garbage (he was made about something.) And on the floor amid the other trash was four upgrade certificates!!! I would have been crushed if I lost them!
So the cat's system is to put all the travel related mail (except reservations) in a folder called (ff stuff to be filed) and on a weekend like sunday morning go through each piece of paper VERY CAREFULLY!!! CATMAN