"I don't smoke and I don't drink alcohol"

In this quote, Radha Mitchell is specifying that she does not participate in 2 common vices: cigarette smoking and drinking alcohol. By clearly specifying this, she is making it clear that she does not take part in these activities and does not wish to be related to them. This could be viewed as a statement of personal values and choices, along with a way to range herself from any negative connotations that may be connected with cigarette smoking and drinking. It likewise reveals that she is positive in her decisions and does not feel the need to comply with social standards or pressures.