so... for registration for NANOG, i am REQUIRED to specify
a tee-shirt size before being allowed to proceed.
i've seen silly stuff in my day, but this might take the cake.
as a suggestion, if you (and you know who you are) insist on
requiring folks to specify clothing preferences/styles before
allowing them to register for a network operational conference
you -might- allow them to opt-out by specifing NONE.
as usual, YMMV