... because it turned a bare trope listing into a "Shaped Like Itself" Zero Context Example. The single word "Yes" is not content.
Please see All The Tropes:Examples Need Context for an explanation as to why doing this is a bad idea.
You aren't in trouble - don't worry about mod retribution for doing this. (All The Tropes:How We Do Bans Around Here specifically says that making an honest mistake is not something that's ban-worthy.) I do ask that you do better next time, though.