Last Class Mail

On the subject of the mail, when I receive letters from my bank or credit card company that say "Important Information About Your Account" on the envelope, it really irks me when I open it to discover it is another stupid credit card offer. I have seen data that indicate that printing lines to that effect on the envelope stimulate recipients to open them three times faster, but I have to say it makes me stuff them into the paper shredder 50 times faster.