I dont want to held as a "prisoner" inside the game
Due to League rules If someone or couple people grief (int, troll, etc) you end up being their "prisoner". If you leave the game you can get banned and because of it you are stuck doing something you dont enjoy, and you cant dodge every other game because of the queue timer penalty. So if you plan to play just a couple games for fun well Good luck!
I would rather leave that game and go lvl up another account or play something else than be forced to walk around doing nothing. Looking at human psychology i dont believe its healthy to be stuck in an environment you dont like, the anger piles up and molds a person into another toxic player.
Im honestly considering leaving those type of games, I would like to keep myself calm and spend my time on something else. I join a game for 2 reasons, try my best to win and to learn something from my mistakes (dont mind losing games).
If there is a rioter reading this, what is your (Riots) stance on people being held as "prisoners" by griefers