Yes, their should definitely be stricter rules. I'm not saying every 14 year old child is immature, but at that age around 40-60 percentile of the kids tend to have an immature behavior on things, For example: the Number 69, The Word Come, People Farting. If a child at the age of 11 to the lower teens sees that Hey I can say whatever I want, Disrespect anyone I want and I can get away with it, They play videogames which are somewhat violent for their age group and it fires them up and gets them angry, and they see a place where they can disrespect everyone/anyone who they come in contact with, Something they can't do in their real life world. Another reason is because the child's brain is like a sponge. Therefore, if these kids think they are good at a shooting game, they will think they can shoot anything with any type of Gun, (AirSoft, PaintBall, etc.) if they play fighting games like UFC or Smackdown v. Raw they will think they can beat anyone up because of their fighting skills and end up getting hurt.

Well it can go either way its just the matter of how Mature the kid id. if you are fine with your child playing Violent games, then that's your decision.the way your child acts is different. if they aren't bothering you and acting mature, then that's fine but you cant really complain when a kid is acting immature.Yess, they are annoying but unless you like starting fight verbal fights, then you cant complain because they have a "Mute" button for a reason. Some people just dont realize that or dont make use to the button.Its not your business if their parent let them have a Game before 18.
by that time, you dont want to play Video Games as much. but when they Do get annoying, Make use of what you have, by either muting them. Leaving games with them in it, or whatever it takes but you cant really complain