You can't call for other people.
It's disrespectful.
Like when you call jungle, but someone before you called mid and called jungle for his friend. It sucks and it isn't fair. One time, a guy called for 3 other people and I was left to fill for them even though I called what I wanted. I mean if things like that happen and someone calls for their whole party of 4, i'll only have 25% chance of getting what i actually want