Not to mention that no one knows how to fill them out - or to answer the questions.

The listing on the back is only necessary if you're over your allowance, but I see many people scribbling things like a $25 dollar sweater on the back.

Also, they ask you if you have food, rather than asking about food that's not on the approved list. I have chocolate all the time, but just check "no", knowing that I'll get the third degree if I check yes, even though there is no problem with what I have.