Would you agree I'm in the right for trying to prevent my sister getting a tattoo?
I'm not sure. Why are you trying to keep her from getting one?
I don't think they're safe, but she's reckless. She'll probably just pick the best looking one and get it.
Even if you are jealous that she would get best looking tattoo, you shouldn't stop her from getting one. People should be able to express themselves as they want.
I know but I want her to die at school
That's a terrible thing to say! You shouldn't wish death on people just because they annoy you. You'll have a richer life if you get along with your sister.