I could have 4 challenger players playing on a gold 5 smurf when I am in platinum 5. I win games I shouldn't win and lose games I shouldn't lose. Because there is no way of knowing who is who on the accounts.
Smurfing has always been a thing. This is the real problem with dynamic queue, lets say I'm silver 4. My friend is Silver 5 who I know is horrible. He queues up with some Gold 2 who carries him into Gold. So now he's put at a rank that's higher than mine which might mean higher skill, but it doesn't. Basically rank doesn't mean skill anymore, as long as you can get carried by your friends.
