What are totally normal and perhaps even courteous things authors do that put you off?

I’ve come to realise I skip all works that mark NSFW chapters.

It’s 100% a lovely thing to do for those who want to skip smut and those who want only smut, but once I see it I feel like all excitement and tension is gone before I even started reading, so it’s an auto-skip at this point.

Anyone else put off by some things that are, by all accounts, nice?

EDIT: I insta skip entire fics that mark NSFW chapters since some commenters are confused😅