Why is it up to the woman to leave a bar when being accosted by a man? Why is it the woman's responsiblity to take the high road?
Regardless of sex, some jurisdictions have a "duty to retreat" as part of their legal definition of self-defense. Basically, it says that if you can leave the situation (a typical exception is your home) then you must do so, and only respond with force if unable to.
IANAGL (I am not a Greek lawyer) so I'm not certain whether this is or isn't part of their jurisprudence.