I'm just going out on a limb here and saying that if you're in a setting were you kind of need the boys to focus (interview, photoshoot, etc.) it's probably not the best idea to give them Nerf guns ; Not a good idea. Who cares.
Again, Ziam. My theory is that they were dating until Liam met Niall, and Niam became real. This broke Zayn's heart and he's had to live with it until he finally he quit the band. He couldn't stand Niam.