Most are usually just too lazy to get the stuff themselves so they resort to their scavenger ways. Others are just broke ass motherfuckers.
They're number two from the bottom of the pyramid of society, 'bums' being first. There are usually 1 or 2 in every social group .
Scavenger 1: "Hey let me get half of that pizza."
Scavebegr 2: "Let me get half of that half."
kid 2: go fuck urself you god damn scavenger, this is my shit. get ur own god damn sammich u broke asshole.