A Scene Kid is someone who thinks something is awesome because it's currently in style or "cool".
Who made it cool? Well, take the lamest thing in the current day; happiness, a good attitude, and looking like you're not a sociopath. Now, look at your modern Scene Kid; sad/angry/upset, a generally shitty attitude, and they look like they are sociopaths (or something straight out of a Tim Burton movie).
I would much rather be lame
than a Scene Kid.
Scene Kids are tools