Riddle

If you can curl, here's a mission for you :
Knock once at door number 3 on pir2.link and run like a coward.
Then at door number 1, you will post a form in the mailbox, its title is
CENSUS, and its question, Who lives here?
Finally you will reach door number 4, just to get the sesame
then come back here and refresh your perspective on the situation.

I almost forgot to tell you :

you don't need protection in that street.
you don't have time to linger (no one will serve you coffee anyway)...