Are you talking about people who talk or mess around at recess and lunch too? People that take a break during their breaks? \
We dont all have the pressure of asian parents and their expectations, we also like to take part in activities that have nothing to do with education or getting a job in the long run. I think its important to be well rounded, to have interests and to devote time to things that were not forced onto you by parents or anyone else.
Also.. learn 2 english.
+1 to a certain degree. People should be able to use their breaks... to have a break if thats what you mean, occasionally i play counterstrike at lunch but its my break so why should anyone care?
Maybe because they have to go to school and not because they want to?
It's definitely not cool if they're shouting out in class or distracting the teacher and ruining it for everyone. However, if they're *quietly* chatting or not doing their work without disrupting anyone, who are you to say what they do, its their life and you cant tell them how to live it like some kind of fascist nor should you really worry about their life either.
Just try your best to ignore them.
you should be hitting your head against the wall when your in my position and you have people who dont do any work in class and still somehow beat you.
Sympathies man, I've had that happen to me too.
Just laugh at them and their future of cleaning toilets 
You're not really superior to anyone or better than any person even if they do clean toilets imo. Sure they might of been a tool in high-school but imagine how much their life would suck if they were cleaning toilets.
At our school the canteen is used as a "Study hall" for your frees, it's dead quiet. The chick who administers it used to be a former cop...she definitely has spine crushing potential. Nice and quiet... too bad i only get 2 free periods a week...which are in the mornings... so i use them to get some sleep for a change.