People with awful manners, and act obnoxious and disrespectful. Yes, I am 13, and a lot of people my age are the prime suspects of this type of behavior, sadly.
Oh, and people who want guns banned. Pretty much, the law abiding people are going to cower in front of the law, and the "bad guys" who don't care, will get their hands on the guns somehow anyway. (A ton of people constantly get a hold of illegal drugs, so it would be the same way with guns) So basically we are just disarming ourselves, making mass-shootings a lot more dangerous, because then, nobody would be able to stop the person shooting up the crowd.
OH!!! AAANNND... People who think video games cause violence, hinder mental growth, ect. I had almost a 98 overall GPA last year, and I play games... A lot. I have put over 650 hours into one game in around 7 months, have put over 150 hours into Animal Crossing New Leaf in one month, and have actively played Call of Duty 4 and later since the age of 9, because my parents knew I could handle it. I am not the slightest bit violent, and barely ever get in trouble at school, ect. I am a very strange child.
To accompany the thing with video games, and violence/immature behavior, is that those kids that were more immature about it, were probably not able to handle the game as well as some other kids like me (I am not trying to sound cocky in any way) and probably should have had to wait longer to play it. Also, their parents need to set it straight with the kid that the video game does not really relate to real life, and that copying the material within it is not "cool".
I have friends in school who barely are allowed to play violent games at all, but have around 70-75 GPAs, but of course, everyone varies, and there are other kids who play violent games and seem to have not handled it as well. (Again, parenting, and a lot of other factors)
Sorry if my viewpoints upset somebody, and that I brought up politics. Not meaning to start a flame war. Just stating things that simply bug me, and describing things about them.

I ramble a lot >_>