This is gonna be completely, half-assed random; if you do write this I'd love to read it, merely the fact a lot of fanfics have become repetitive, and as I believe someone else has said there just simply isn't enough action ready romance frerard's. I myself am somewhat writing one already basically on the fact that practically none exist.
All in all, I'd love to read your story on this, see how it all plays out. Stretch the boundaries and try something different. So yeah, my half-assed ramblings are over.
There is simply not enough violence and smut and frerard in the world and when you have all those things put in to one story, the world is a better place and it can bring world peace. Seriously, there should just a never ending book of violent smutty frerard handed out to everyone and then BAM! World peace.
But really, feel free to write as much of that stuff as you want because I will ALWAYS read it. I'm completely obsessed with it, especially when it's stuff like mafia frerards. So please write some sort of amazing, beautiful frerard story where everything is awesome!!!! Please!!!!