Will there be any punishment if someone lies? I think that a good portion of people know that people will filter No AI so they will just lie when setting the tags.
Our same quality guidelines apply, if you abuse the tagging feature to lie then you will no longer be eligible for indexing on our discovery pages.
https://itch.io/docs/creators/quality-guidelines#do-not-use-unrelated-tags-or-classifications-to-promote-your-game