Decline in teen drug use continues, surprising experts

I always thought, thank goodness for video games because without them I would probably be a drunk or something similarly physically harmful. I guess the world is just now catching up :-D

I used to regularly skip meals when I gamed. Weight started creeping up after I quit

You also got older ... Age is a factor.

Does weight increase as you get older if you consume the correct amount of calories?

Weight will increase as you get older if you consume a constant amount of calories. Your metabolism slows with age (and generally entering the job market means a much more sedentary life style for most white collar workers).

People tend to have more major life events as they get older, and sometimes they choose to soothe with food when facing major loss in other areas.

So you adjust your calories

Calorie counting is a habit that's generally unnecessary as a teenager so it's a habit not everyone is familiar with.

No, but the 'correct amount of calories' is a steadily decreasing number, so it requires constant adjustment.

Easy to say difficult to do. Most people have family, work, 100's of tensions etc.. Reducing calories might not be that much of priority.