That is very ambitious and idealistic. You cannot make up of years of ignoring their teachers and years of video games in a few posts. Likewise, you cannot not impart years worth of experiences in a few posts. That is what living, collage, and high school are for.
Go ahead...give your idealism a try on this kid.
The number of mature posters appears to greatly outnumber the number of immature posters.
How many posts will an immature poster read in a year?
What will the cumulative effect of that be?
What will it be if those who are more mature are compassionate and gentle with that person while at the same time apply undeniable logic to the things they say?
Everyone wants to appear smart. I have seen immature posters argue tooth and nail some inane point. And then later when they have forgotten who said what, they repeat, as if it were their own, the good arguments of the other.