If it's optional, then don't make it mandatory
I was filling out an online form, and it gave me the option
of providing feedback on the service I had received.
The button was marked "optional", but I clicked it anyway
because there were one or two things I thought were worthy
of mentioning,
suggestions on how they could improve the user's experience
with the Web site,
that sort of thing.
What came next was not something I was expecting.
I was faced with a 43-question survey asking me to rank
my level of satisfaction on scale of 1 to 5 on each of those
43 different axes.
I skipped all of those questions since they aren't why I
chose to give them feedback.
At the bottom of the form were three free-form text boxes
where you could make suggestions for improvement,
complain about something that didn't go right, that sort of thing.
Those were the boxes I was after.
I wrote up my suggestions and clicked Submit.
Error:
"You must complete all the feedback sections before submitting
your feedback."
Wait a second.
I thought you said that giving feedback was optional, not mandatory.
Don't give me this "mandatory optional" nonsense.
If it's optional, then it's optional.
I decided not to give them any feedback at all.