real story;
string sender;
sender = "Dumatus";
Boss: The user must to be logged in to download, so when they click on download button the system must show the login form.
Programmer: Ok.
(Some time later...)
Boss (by phone): Programmer, I'm here at customer's office. There's an error on download button...
Programmer: What error?
Boss: I'm clicking on it and the download starts without ask to log in
Programmer: Are you logged in?
Boss: Yes.
(Long silence followed by a phone thrown at the wall)
--
T-shirt: Send nulls