Of Course we care.
I had a little sister too, who was also 2 year younger than I. She would drive me out of my mind sometimes.
I think I would just print out what you have posted to us, and hand it to your parents.
There are ways of making this situation much better for both you and your sister. I had two sons who had to share a room a few times, and there were many times I would hear yelling coming out of their rooms because one was into the other's space.
I found that large decorative room dividers worked wonders. We actually divided the room in half. Both boys had duplicate dressers, night stands, etc. Plus... Scott and I set up some strong rules about respecting other's property and personal space.
I am pleased to say both boys are grown, alive and well...
Hang in there. And I hope you can get this somewhat resolved.