After watching the two supervisor candidates make their own rendition of Dumb & Dumber, I was left alarmed that one of these bozos may indeed be the next supervisor. However, I heard about this write-in ballot and yes, it has been confirmed, that you can request a write-in ballot to vote for a candidate not on the party nomination.  This is NOT publicized because party committees want you to vote for their endorsed candidate and not for anyone else that may jeopardize their candidate.
The policy and procedure for the write-in ballots can be found on the NYS Election Law Document: 

And I'm sure if Joe and Aileen keep opening their mouths and continue their faux pas, Mr. Martino may just get write-in ballot votes.