And I am "oppposed to" your answer as the only one.
I think that the contrary to what you have said is in fact true.
"opposed to" should be accepted.
I almost put "In opposition to" before looking at the hints. I wonder if that would have been accepted.
No, I'm against YOUR idea. Ha, take that!
Your profile picture totally matches your comment. Lol.
"I disagree with your idea" is not accepted.