The term itself is more often used to describe an individual who has a worth of equal or lesser value to a scum bag in the opinion of the one using the term.
Ewww... our hotel room has scum bags under the covers!!!
Which one of you scumbags took the last piece of pie!
Smoke cigarettes at an early age
Vandalize property
Kill animals
Listen to heavy metal
Have no regard for school, people, or life
Use drugs (mostly Marijuana but also hard Meth use)
Own a truck or some large vehicle
Own lots of land, guns, and live near woods
Occasionally deal drugs
Frequently break the law
Smoke a Cigarette down to the filter to get as much a high as possible out of the 'bacco
* A lot of New England scum bags will surprisingly succeed at alot of things
Alex: Yo, dude. That bud you sold me was the shit! Anyway can you steal some Cig's from the mini-mart? Oh, and some condoms.
Ryan: Shut the fuck up man, ill fucking kill you. Were gonna score some booze tonight man, you in?
Alex: Nah, me and my cuz are gonna smoke some crystal and joy ride down by the power lines.
Mason: Whispers* hahah! alex is such a scum bag