
Love this discussion!
I think Ginny was really rebelious just like Neville and Luna were. The three of them probably gave Snape and the Carrows a very difficult time. She's related to Fred and George so she wouldn't just sit back and watch Death Eaters run the school. I would have loved to learn more about what took place at Hogwarts in Deathly Hallows.
I think Neville would be the one to give directions, but Luna and Ginny would definitely come up with ideas for rule breaking, like the Graffiti, etc. The others students probably got their courage from seeing the resistance Ginny and the others put up.
I don't think any quidditch took place that year, because of the atmosphere, and I don't think Ginny would have been made prefect either, she was all too close to Harry, everyone knew that.
About the romantic feelings, we knew all along that Harry was the only one for Ginny, even thought she was going out with other people, Harry was the only one in her heart. So, I don't think Ginny would ever have romantic feelings for any other guy, especially when she knew how much Harry loved her and how much she meant to him.