The worst thing offrole players do is not communicate
I got 3 offroles on my team. Nobody swaps and nobody dodges. 2 of them complain in chat but arent willing to leave, so we didn't even know the 3rd one was filled until post game.
Well it turns out 2 of them could have easily swapped around and ended up in their main role. We could have has a much more manageable game with only 1 off-role lane instead of our entire bot and jungle being off-role.
That one player who did not say anything and did not offer to change when he had literally 0 games this season on what he was filled to (jungle) made that not happen.
Communicate with your team, please. Silence helps nobody.