While, personally, I couldn't imagine allowing in anyone who would show up after the party was over and then asked to be invited in, I totally could see DF doing that if I were not around since he grew up with a swinging door on his house (meaning people came over ALL.THE.TIME uninvited -- even helped themselves to the food in the kitchen). Since I know DF would feel a bad host or, worse, a bad Christian, for not offering his hospitality when asked for it, he would feel obligated to let these people in. He also would've given the balloons and apologized for not having more goody bags. Me? Not so much (but, again, they would've been turned away at the door -- fake-smile plastered on my face and saccharine-tone as I "apologize" and let them know that the party is over (DF wouldn't have seen a problem...but he's not the one who would've been involved in doing the bulk of the prep nor would he have realized that he was teaching his child that being polite to outsiders is more important than not letting them get away with hurting his child).