A thread inspired by Ebit, vuvu and the police.
When your doorbell rings do you:
(a) simply answer the door to find out who's there;
(b) sneakily look out of a window by the door to see who's there before deciding whether or not to answer;
(c) ask them to identify themselves then decide whether or not to answer the door;
(d) live in a flat with an intercom so you know who it is before they get to your door.
Personally (a). There was an old guy down the road who'd do (b) and you'd see the net curtain at the window by the door twitch before the door opened.