Nobody is preventing anyone from doing all that, since it's an online game with anonymity and nearly every single match, you are matched up with random strangers you have never met before since the game is so populated. There's also some sad people who purposely lose the game for his/her team by doing something called inting, this can also be a menace as losing always has this bad, terrible feeling to it. In-game, your child can be told to kill themself which is common and also be 'flamed' as in their teammates will insult and berate them for performing badly since it's a competitive team vs team game. The game can easily destroy your child's life through them getting bad grades because they want to play the game more or become 'toxic' as in they will use insults more and be disrespectful to others in real life. I have spent too much time on this game (9,000 hours) and my best advice to parents is to prevent your child from playing it like you would prevent them from crack cocaine.