On the other hand, unscrupulous employers tend to exploit younger employees by giving them more hours, for a few reasons (fortunately, I've never worked at a company like this, but I know I dodged a bullet).
"You don't have a family to go home to, so of course you won't object to working until 9pm every day."
"There are a gazillion fresh-out-of-college people with your exact skillset I can hire to replace you in a heartbeat, and you don't yet have the professional reputation to easily find another job."
"You don't have a nest egg built up yet, so if you quit on me or I fire you, enjoy defaulting on your lease and couch surfing until you find something else."
"You don't have a family to go home to, so of course you won't object to working until 9pm every day."
"There are a gazillion fresh-out-of-college people with your exact skillset I can hire to replace you in a heartbeat, and you don't yet have the professional reputation to easily find another job."
"You don't have a nest egg built up yet, so if you quit on me or I fire you, enjoy defaulting on your lease and couch surfing until you find something else."