AITA for telling my step sister to get the hell out my room?

A catharsis for the frustrated moral philosopher in all of us, and a place to finally find out if you were wrong in an argument that's been bothering you. Tell us about any non-violent conflict you have experienced; give us both sides of the story, and find out if you're right, or you're the asshole. See our ~~*Best Of*~~ "Most Controversial" at /r/AITAFiltered!

Aita for telling my step sister to get the hell out my room?

post your stories inquiring if you are or would be the asshole. the subject matter is not restricted, so you can post what you really want to talk about. Feel free to share your honest opinion in the comments, just be kind to each other... Are you the asshole?