As they are your brothers, it is completely acceptable to:
-Come out of your room with a nerf gun that you shoot them repeatedly with.
-Smile the knowing woman smile and remind them that they'll keep.
-Smack them upside the back of the head and tell them to stop being giant asshats/jerks/worm farms, etc etc.
- Tell embarrassing stories of their childhood in response, including that one time J ate a bug and vomited everywhere on Bs shoes, resulting in them both crying for hours.