tumid bsimcha: You are correct. When people start dating they all do it. Its after suffering from PTDS (Post Traumatic Date Syndrome) that people stop.
By the same token that its proper for a guy to walk the girl back, so too, its proper for a girl not to lead a guy on. Guys who have been led on will not walk a girl back to her door if he thinks she may be playing the same game. Its too painful.
Consideration goes BOTH ways. Girls have just as many responsibilities as guys. When we understand that, we usually end up with very few complaints as we are busy focusing on our responsibilities.