I agree with none of the above or I don’t like. Also the butter poll should have included corn on the cob.
If the purpose of the poll is to show how many of the RF participants like various ‘stuff’ on or in the Taco, I think having the alternate choice that says “None of the Above” is a valid entry. 

     I wish that some of the polls had the capability to allow multiple answers, or a prioritized response..say three points for your top selection, two points for your second choice and one point for your third pick.  These would let you say what many seem to want to say…I like the Meat and Cheese but Gucamole is important also.

I don’t respond to some polls because I just don’t care for the item being measured. If there is a place to say that, I will vote ‘Yuck“. That should tell the reader that a small (or large) percentage of the participants may not care for the item at all.