Man, I remember passing around the first book in seventh grade like it was contraband. We were all twelve or thirteen. Honestly, the violence is stylized enough that it didn't feel graphic to me then in a gory way; it was more about the tension and the concept. What stuck with me more than any action scene was the political manipulation, the way the Capitol used spectacle. That's pretty heavy, but in a way that made me think without feeling traumatized.
Some parents at my school freaked out about the kids-killing-kids premise, which is fair. But for a lot of us, it was a gateway into dystopian fiction. It sparked way more conversations about media, government, and class than any social studies lesson that year. The romantic triangle stuff felt secondary, almost like a required subplot to get the book on shelves. I'd say if a kid is already consuming typical PG-13 action movies, the books are a step up in substance, not necessarily in shock value.