"'Cause you were Romeo / I was a scarlet letter / And my daddy said stay away from Juliet"
mess at you choosing a song she wrote when she was like 16/17
and lol that line is literary allusion
"scarlet letter" is a reference to the book by Nathaniel Hawthorne where a woman is made to wear a red A (the scarlet letter) on her, as punishment for her adultery. It's a symbol of defiance, of her going against what society (in this case, her parents) wanted her to do, hence the whole Romeo and Juliet allusions. She's their love's symbol of going against what society/her parents consider right. So in the end, 17 year old Taylor Swift is smarter than you, and if you want to discredit her songwriting ability maybe you should have picked another song