You have a point there. The maker of the above video did implore his audience to print their nerf blasters in bright, toy-like colors, and not colors like black, olive or tan, which might lead other people to mistakenly believe the toy guns are real (and call the police).
I certainly don’t recommend one with a convincing silhouette, such as the one he has for the click-baity title picture. The “Caliburn” and “Talon Claw” look more toy-like to me (in their silhouettes). It’s also probably a good idea to play with them during the daytime, when the bright, toy-like colors are visible.
Also, it’s probably not smart to brandish them, while walking into a bank.