With her other friends who have similar sentiments. Your profile would suffice. It's fine to say you have no interest in the movie based on the trailer, that's not even the issue. It's that it has been brought up so many times. What more is there to say after stating your dislike and giving the reasons one time?
It's really no different than me going into some series thread I don't like and confirming to everyone how little value it is to me. And when I'm finished, I do the same thing two days later.
When I asked Radiantbeam what she didn't like about the trailer. She said - "Pretty much everything" That is what you call "no expectations" or the "expectation to be a bad movie" I wasn't replying to you, I was replying to her. So what you think of the movie has nothing to do with this. There wasn't a single possitive aspect about the post, and it sounded like she had no interest in the movie. That's not to say that won't change in the future, but is there a point stating how little appeal the movie has to you constantly? Why not wait until there is something more to discuss. Even if history just repeats itself, at least it would be something new for her to downplay. I've heard similar comments to those at least 10x's from the same user. I am free to reply to them.