] What do you all think? Do you see signs of this addiction/attraction to 'violence' as Tave suggests?

Aside from the 'teenage angst' and immature and selfish nature of Marianne, I do believe (along with her mother) that she has the characteristic tendency to desire to wallow in her misery, who is more comfortable in that which strokes her pain, rather than rising above it. (I know people like this.)