Adhesive X-es for marking 'No' on Alpha posters

Following the news that someone was arrested for criminal damage while writing an X in the 'No' box on the Alpha posters I say let's stockpile transparent adhesive crosses (suggested type / font thingy below) with which to mark the posters while remaining within the law. Or just use Post-it notes...




To be fair these would work equally well in the Yes or No or Probably / Possibly categories although I was thinking more of the "No" section when I searched for a nice ballot-shaped X for illustrative purposes.

This post was inspired by xkcd's 'Actual size' stickers which can be bought here.