Postal services have funny laws that are often way more serious than you'd think - I'd worry that by lying on a form like this you're committing a much more severe crime than you realise.
Both the absoluteness of the citizen’s right under
§4009* and its finality are essential; what may not be
provocative to one person may well be to another. In
operative effect the power of the householder under the
statute is unlimited; he may prohibit the mailing
of a dry goods catalog because he objects to the
contents—or indeed the text of the language touting the
merchandise. Congress provided this sweeping power
not only to protect privacy but to avoid possible
constitutional questions that might arise from vesting
the power to make any discretionary evaluation of the
material in a governmental official.
If you don't genuinely believe it to be this, and are just using it to get out of junk-mail, then you're lying on an official form.
You ask a judge or jury to use their common sense. Were you aroused by a pizza coupon? No, obviously not.