Stop subjugating the 5th man!
Just because you and your three friends are in a group doesn't give you the right to tell that random person you're paired up with that they have to go to a role even if they called another one first and force them into dodging with the timed ban or threats of reports.
5th Man: Mid Friend 3: Actually I want mid 5th Man: Sorry, I called it first. Friend 1: We're all friends, just let "Friend 3" have mid. Friend 4: Yea just go support. :) All Friends: Locks in*
Then if you won't let them dictate you and go for the lane you rightfully deserve they report you and since it's all 4 of them they can push the other team to report you too.
Have some courtesy, they're just trying to enjoy a game. Let them have the lane they want even if they didn't call it first because you're going to enjoy it anyway because you're talking and having fun with your friends. Don't get them to do something they don't enjoy and make it even worse because they feel like they got forced and threatened into it.
By 5th man I mean the last random fifth person you get in the team, not the fifth pick person.
Did somebody say subjugate?