This is just a curiosity that I had after reading this post: Can I lose a hat?
Probably this is not the explanation here, but I was wondering if the Hairboat hat is awarded manually, which could somehow justify the hat being awarded "by error" and then removed.
Thereby, I am asking if any hat - outside of the evident Archimedes that need special rules because of its nature - is being awarded manually by the staff.
I know that answering this one now, during the bash, could probably cause spoilers and others problems, so it is perfectly fine if the staff prefers to wait before giving this info or only reveal it for the hats for which the award criteria is known.