I don't think the game should be about uh, students and school; since uh, you'll get arrested if it get's know.
It's a good concept, but the setting is vile.
You could put it on any other settings, Payday 2 is pretty much terrorist-attack simulator. It's just that the US is more sensitive to student attacks and stuff.
If you're going to develop this as your first game, I don't know if the media likes that. I mean look at how much MW2 got for No Russian, and even Payday 2 gets negative attention.
I mean a game where you would plant bombs in public settings like an airport would be a rad concept, you just have to deal with the media absolutely tearing you up, and Steam possibly pulling you from their store.