As someone who writes direct mail from time to time, I'm used to all the techniques that people use to get you to open the envelope. This official-looking letter from Capital One goes perhaps one stage too far, however, in advising me that I shouldn't mutilate the contents. I know that people can sometimes get a little annoyed at the volume of mail they receive and might - in a fit of frustration - get involved in bending, folding or tearing. But the idea that anyone would mutilate an offer for Capital One Platinum MasterCard® is just too awful to contemplate. Particularly with 0% interest on balance transfers until 1st November 2007.