EDIT: Note the date of this post. It's just before the change to the dodge penalty was implemented.
You are first pick. You main AD carries.
random guy who mains AP mid is second pick
random guy who mains top is third pick
Random guy who mains jungle is fourth pick
random guy who mains AP mid is fifth pick
you lock in as an AD carry, and the second locks in as AP mid, someone like Ahri or Leblanc, or Brand, where their only place is mid really.
5th pick is like "Wtf guys I wanted mid." after 2nd pick chose
When it gets to his pick, he locks in Annie, instead of adapting to team, because with the new queue dodge system, he realizes people are more likely to dodge when he does such things since people would rather wait 30 minutes to ranked over losing 11-13 Elo for sure, so someone dodges.
Rinse and repeat until said 5th pick gets his role, with possibly several innocent players affected and being forced to wait to queue up again because of one player deciding to not adapt to team needs because trolling is easier and more efficient to gain Elo now.
If teams sack-up and accept the trolling for what it is and take the Elo hit, then he can just dodge himself. After all, it's only 30 minutes now.... Maybe play on a smurf, etc.
I personally propose a way to report what happens in lobbies, if this change is implemented. There is a rather obvious difference between going outside of a meta with a duo queue or just a unique comp, and trolling in order to cause misfortune upon others.