If you say this to your parents, I wouldnt be surprised if they
raised an eyebrow, knowing how the older generations are
like.
Nothing wrong in stating you want your freedom, but when you insist
to have freedom even in being a baddie or an ah lian, you arent
showing that you are mature to your parents, even if you are. Coz
doing something bad can be self destructive, and no sane parents
would allow their children to 'fall along the way'
This is different from saying you want to be a doctor, and your
parents want you to be a lawyer.
Sometimes parents arent worrying about your maturity. Humans, as
all are, are prone to carelessness, or moment of foolishness and
stuff. This is the part they might be worrying if you kena anything
from the old man.
but, anyway, just talk to ur mother first, see how.... 
